What's The LARGEST STRUCTURE In The World? 🤔 kzread.info/dash/bejne/hZ2cxbeGiNiTp6Q.html 🏗

@unaincreibleroca3427

Жыл бұрын

huh? just one like on the pinned comment? or is my youtube malfunctioning?

@proffed3364

Жыл бұрын

WHAT

@proffed3364

Жыл бұрын

1 COMMENT AND 3 LIKES

@unduckablealex3048

Жыл бұрын

Yes

@geometrystash

Жыл бұрын

The Burj Khalifa.

1) Do this on the moon. I always thought a "jump through the moon" theme park would be awesome. 2) Why calculate the weight of the traveler and suit? It doesn't matter in a vacuum. 3) You would experience weightlessness for the entire trip, not just at the center of the earth. Thanks for making a fun video!

@itsdonaldo

Жыл бұрын

Moon diameter is over 2000 miles. The temp at the center of the moon is between 1327-1427 degrees C. We have to do it on another planetoid

@OgdenM

Жыл бұрын

3) actually you will feel like you are weightless but since you are still moving (and very fast at that) and have mass.... One tinny move even in a vaccum and you go slamming into the wall. This is because changing positions means your Center of mass changes which changes the way you are falling. Youd need some propulsion system to keep you in the center of the tunnel at ALL times. Even if it's dug through the axis like the video suggests.

@oldnelson4298

Жыл бұрын

2) Because f = ma.

@felixstuber8046

Жыл бұрын

​@Old Nelson That means, on the one hand, that you would experience a greater accelerating force if you have greater mass, but on the other hand, more force is needed to accelerate you by the same amount. You can do the in depth calculations if you want and see how the mass cancels out. Or you watch a video of a vacuum chamber where they let fall a bowling ball besides a feather. They reach the ground simultaneously.

@oldnelson4298

Жыл бұрын

@@felixstuber8046 Hmmmm, you may be right.

Assuming there is air in the tunnel, there would have to be friction as well. The friction would prevent the object from falling all the way through to the other side. Each swing in the opposite direction would become progressively shorter until the object would come to a dead stop at the center.

@akotarakz

6 ай бұрын

I was imagining the same 😄

@GRosa250

6 ай бұрын

He said the tunnel was a hypothetical true vacuum (unlike outer space) so the object would oscillate indefinitely, unless it was contacting the side of the tunnel.

@EmilyTienne

6 ай бұрын

@@GRosa250 A hypothetical true vacuum, meaning both ends would have to be sealed off to prevent the atmosphere swooshing in. Then I could see perpetual oscillation, provided there was no contact with the sides.

@_WOR

6 ай бұрын

@@EmilyTienneWhat race are you? 🤨

@EmilyTienne

6 ай бұрын

@@_WOR The human race.

actually, weightlessness is felt during the *entire* fall ! (if and when - like in the video's example - the air resistance is zero and the terminal velocity is only due to gravitation: those 28.000 or so km/h) and not only at the earth's center. But ok, we understand that you meant that even something *at* *rest* at the center of the planet would experience weightlessness...

@nugboy420

Жыл бұрын

I may be mistaken but isn’t it the feeling of weightlessness due to falling at a constant speed or something? With terminal velocity being due to air resistance there is nothing to stop the acceleration. Even in this case there is as earths acceleration 9.8m/s^2 (I’ll call x) is on the surface and the closer you get to the center x decreases. You are still gaining speed here, however it is less of a gain than before.. even here you feel yourself gaining speed.. Once you hit the center of the earth (tho you would be traveling at a velocity too fast to realize it) your acceleration would be 0. Then as you pass thru the center, gravity starts working in the other way, so -x in which x will increase as a function of how far away from the center and blah blah we know that. My point is brought up because skydivers in air reach terminal velocity but don’t feel weightless, the moving air seems to remind them they aren’t weightless and are falling towards the ground… I’m assuming the zero G planes get around that by the plane itself hitting terminal velocity and having the people inside not effected by wind resistance? Not sure. Also the space station is in a constant rate free fall around the earth hence the weightlessness. This ties back in to the center of the earth. As the jumper’s acceleration lowers towards 0 the presumed weight of said jumper will get lower and lower, though their speed will still be great. (Relate to the plane and skydiving references above). Again this is myself hypothesizing so yeah. If this opens up a discussion I’d like to hear because I know I’m wrong on some parts cuz I think I might be misunderstanding some other things I have learned relative to a problem such as this. Idk I’m smart tho and came up with a hypothesis. Sorry for long response but I’d love to see what I got wrong or if I was right in any instance.

@fizzmaister

Жыл бұрын

@@nugboy420 no, you're quite wrong. Any object in free fall will experience 0g. A way of looking at this is to do a force diagram. When you stand on the earth, you're being pulled down with a force of 9.8m/s/s times your mass. You are resisting this force by applying an equal force against the ground. You don't actually feel the force of gravity. You feel the force of you pushing against the ground. I can go into a bunch of stuff about relativity, but suffice it to say, you don't feel gravity because it's not actually a force, but rather the curvature of spacetime. Now take a skydiver. The moment they step off the plane, they're weightless, as they're free falling and only accelerating due to gravity (which you can't feel). However, as they accelerate, they face more and more air resistance, until they reach terminal velocity where the air resistance equals gravity, and they fall at a constant rate. This is the same situation as if you were standing on the ground, and you feel 1g. If the skydiver is going faster than terminal velocity (for example diving headfirst, and then switching to a high drag position, they'll feel more than 1g as they decelerate. The space station does have a (more or less) constant speed. However, it does not have a constant velocity. Anything in a circular orbit is experiencing force at 90 degrees to it's forward motion, resulting in the speed staying the same, but the direction constantly changing. Astronauts in space are weightless because except when engines are firing, they are in a free fall, and only gravity is affecting them. 0g planes work by flying a parabolic trajectory. It's the shape as if you throw a ball into the air with some forward momentum. Again, because it's following a free fall trajectory (and using engines to counteract air resistance), the inside is at 0g during the parabolic section of the flight. Likewise, falling through the earth (in a vacuum) would cause you to be in free fall for the entire duration, and you'll feel weightless for the whole trip, even though your acceleration due to gravity is changing the whole way though.

@diemme568

Жыл бұрын

​@@nugboy420 "fizzmeister" here below explained it - but it's a bit complicated. here a *simple* way to understanding the point: *a)* think "free fall is indistinguishable from quietness": that's because every molecule, every atom, every particle of you is pulled downwards with the same, identical, acceleration rate. there is no special point where the "force of gravity" is applied, causing compression or traction somewhere that could be "felt". it's applied EVERYWHERE so you don't feel anything. Everything that's in in free fall feels "still". (examples: the ISS, any satellite - natural (moon) or artificial and any planet in orbit, any star around the centre of any galaxy, etc... - they are all in free fall, only perpetually missing the center of gravity causing the *fall* ) *b)* fall in a *medium* , however, is *not* *a* *free* *fall* . Some surfaces compress or stretch due to the medium's resistance. the wind blowing onto your face and body, when you spring form an airplane, compresses the side facing down, and tractions the side facing up. these forces can be felt, and they cause an acceleration upwards. this force becomes equal to gravity at terminal velocity. then, you no longer accelerate downwards. (but you're still travelling! still falling!) particular case: if the "medium" is the floor, then terminal velocity is reached every time the feet compress enough to decelerate your "fall" into your feet. (in this case the limiting factor isn't velocity, because your feet are solid, not fluid. It would then be the "hub", the path (1/2 cm ?) that you have to travel in order to compress your feet enough: hub completed, force is enough --- you stand *still* ) so the real distinction is between the media (plural of medium) decelerating the fall: a solid compresses tissue via *length* whereas a fluid compresses tissue via *velocity* and quietness is reached at terminal compression length, or terminal falling velocity. ... but feeling the force has always to do with compression of tissue (or traction, if you hang down) in free fall, nothing compresses, or is subject to traction. you don't feel any force.

@nugboy420

Жыл бұрын

@@fizzmaister makes sense thanks for explaining. I appreciate lack of sass I wasn’t sure if any of it made sense. In my head it did lol.

@DeuceGenius

Жыл бұрын

Why would there be 0 air resistance anywhere on earth except under water

Did anyone spot the Wilhelm Screams?! 😱

@HHHjb_

Жыл бұрын

Yes they are used all over in many movies

@KaneryU

Жыл бұрын

You mean hear? I of course, can see sounds myself /s/s

@jibijay

Жыл бұрын

Always. It sticks out like a sore thumb. Dare I say, least convincing scream created.

@phoenix0166

Жыл бұрын

Yes

@dylanbetts2928

Жыл бұрын

5:17

As a fan of physics I have contemplated this in the past. I have to tell you that during your video I was waiting patiently to see the graphic of our adventurer falling through the Earth non-stop and popping out each end of the tunnel. I laughed and laughed and thoroughly enjoyed this clip. Great job.

@DebunkedOfficial

Жыл бұрын

Thank you 😊

@ncard00

6 ай бұрын

This is why the meaning of life is 42…

@spvillano

4 ай бұрын

Only one inaccuracy. The faller would be weightless for the entire fall, as anything that falls in a vacuum is.

@michaelquigley1411

4 ай бұрын

He may "feel weightless" but he won't "be weightless". "Weight" is a function of gravity. If there is gravity acting on a body then it has a weight. You might be thinking of friction caused by an atmosphere. In a vacuum he would be free falling in a frictionless environment.@@spvillano

@spvillano

4 ай бұрын

@@michaelquigley1411 freefall in a gravitational field is about as weightless as one can get within that field. At least until we come up with a spacetime straightener. ;)

7:45: What has the mass to do with the velocity in a vacuum? References to Giovanni Battista Benedetti (1530-1590), Galileo Galilei (1564-1642) and Robert Boyle (1627-1691). That one would feel weightless all the time has already been mentioned in another comment, however the center would be a place where there is no acceleration and thus, after stopping somehow, one could float there in weightlessness.

@OgdenM

Жыл бұрын

Also one thing about a moving mass in a vaccum : Change the shape or position of the center of the mass in anyway and it's gonna change the way it's moving/ trajectory (in this case falling). Ergo, move your hand and you will slam into the wall shortly after. Heck, sneeze and you go splat etc etc. So you'd need that propulsive system no matter what... Even with a whole through the axis. Oh speaking of the axis, it's not like it's in a stable position either. It's constantly moving because the planet isn't a perfect sphere which basically means the axis of the planet has its own orbit... (ergo the axis wobbles and moves in relative position to the surrounding space) And since you are in free fall, you are not effected by it. Oh and speaking of being in free fall, not being effected by things AND orbits... The planet moves quite a bit in it's orbit around the sun in the 45 mins of your fall... I don't think you'll be connected to that movement either because of free fall and that would also slam you into the walls.

@volkeru2718

Жыл бұрын

@@OgdenM Hi Michael, I don't think that changing your position, moving your hand etc. could change your momentum or angular momentum while in free fall in a vacuum. Sneezing or even breathing could of course, both being like rocket engines... But it is very unlikely that your nose would not be fully enclosed while being in a vacuum and you would still be able to breathe or sneeze 😉

This was one of the biggest questions ive had, glad you made an in-depth video about it

@DebunkedOfficial

Жыл бұрын

Thanks for watching 👍

@marmac83

Жыл бұрын

I see what you did there! In depth!

I've always wondered this! Thanks!

@DebunkedOfficial

Жыл бұрын

Happy to have answered your quandary!

Debunked's videos are truly a gem I'm glad to have found this channel full of scientific explanations with a little bit of sass Entertaining like nothing else, hope you can always keep going!

@DebunkedOfficial

Жыл бұрын

Thank you, those are such kind words 😊

@tempusfugit9009

Жыл бұрын

@@DebunkedOfficial I sub bc of comments like this. that whole freedom of speech thing is great.

@ilmaio

6 ай бұрын

How silly! Weightlessness will happen as soon as you start falling, and will continue as long as your fall is unimpeded; a free falling body in a gravity field experiences no weight. That's phisics 101.

You’d feel weightlessness all the way, not only at the centre of the earth. Like astronauts do when flying a « zero-g » dive.

@michaelquigley1411

Жыл бұрын

I have to challenge this. Weightlessness is achieved when centrifugal acceleration equals the acceleration of gravity. Hence, our adventurer will either feel acceleration or deceleration. But for the brief moment he pops out and stops at the end of each fall, he'll feel weightlessness.

@ruirodtube

Жыл бұрын

@@michaelquigley1411 the first part of your comment is only true if maintaining stable distance from centre of earth. In this video the subject is falling towards the centre of the earth thus feeling like a passenger of a “zero-g flight”. He’s accelerating at the same rate as gravity is pulling, therefore feeling weightless.

interesting fact: a round-trip through the center of the earth takes exactly the same time as an orbit around the earth at the same altitude. Neil deGrasse Tyson mentioned this in one of his interviews. I can't remember who he said did the calculations though.

@johnmcgimpsey1825

Жыл бұрын

You can do the calculations yourself. If you're in orbit, you can represent your velocity vectors as two component vectors - the first in the direction of the axis of your hole and the second perpendicular to the first. Both vectors are only affected by gravity, so your speed in the direction of the hole axis in orbit is identical to that of falling through the hole, therefore the time spent during an orbit is equivalent to that of a round trip through the hole..

@mann_idonotreadreplies

Жыл бұрын

@john cool story bro.

@yassinee.3463

Жыл бұрын

@@mann_idonotreadreplies Shut up

@doc_ds

Жыл бұрын

@@mann_idonotreadreplies cool enough to get you to respond

@aby0ni

Жыл бұрын

Didn't know that but it actually makes sense since orbiting is like continuously being in a fall without touching the earth, here you don't touch the earth because you're in a hole, in space because you you have tangential speed that keeps you constantly sliding away from earth. Like how a sine wave is the plot of a point moving around in circle but viewed from a side. How about a hole in the shape of a circular loop around the core?

Guys! As you are falling you always experience weightlessness. Not only at the center of the earth. Also, your mass does have no effect on your rate of acceleration.

@michaelquigley1411

Жыл бұрын

I have to challenge this. Weightlessness is achieved when centrifugal acceleration equals the acceleration of gravity. Hence, our adventurer will either feel acceleration or deceleration. But for the brief moment he pops out and stops at the end of each fall, he'll feel weightlessness.

@MrHarald75

Жыл бұрын

@@michaelquigley1411 If you were in a box or closed your eyes, you could not tell on what point of your path you are or which direction you are going. You'd feel wheitless=falling all the time.

I LOVE videos like this. I have thought about this very same theoretical scenario. I have another one, if there was a massive size planet, one as big as a galaxy cluster and you had a hole dug through the center of it, how close could you approach the speed of light falling through it. What would the speed graph look like. At first is would be going up exponentially but at what point would the rate of descent start to slow down as it starts approaching the speed of light?

Your research and presentation are always top notch! Your personality makes learning fun... Thanks for your hard work!

@user-cz5en1nq3t

10 ай бұрын

There is no need to use human mass to calculate max velocity (or travel time to the Earth center). SHM are written around acceleration, speed and position. Not around force. And if we write second law of motion for gravitational force: m*a=G*m*M/r^2 where m is mass of accelerating object, then we can see that a=G*M/r^2. Mass of accelerating object is irrelevant. Of course it only work if m is really small compared to M, or else we will need to take into account not only acceleration of m caused by M, but also acceleration of M caused by m. In our case acceleration of Earth caused by one human body is not that significant and can be ignored.

what a great video that is! i enjoyed watching every minute of it, thank you for producing such a gem!

@DebunkedOfficial

Жыл бұрын

Thank you! That’s such a kind comment 😊

I was waiting for weeks for your new content. Love the host Love the facts Keep it up

The problem is also that your starting point needs to be slightly further away from the core. Imagine your antipodal point is higher than your starting point, so you come up about 3 ft short of exiting the tunnel. Also, if you launch above the vacuum seal, why not just have it close begins you?

@marmac83

Жыл бұрын

It's a youbtube video man. Also not taken into account was that the earth is not a uniform, consistent material. There are clumps of higher density so there would not be a sufficiently even force exerted to pull from all directions when the centre is reached. Heck, the faller would still likely hit the side of the hold and disintegrate before ever reaching the centre.

@RichM3000

Жыл бұрын

True. Finding out there's a mountain on the other side would be a disappointment.

@ScubaDude1960

5 ай бұрын

Jump when the moon is above the opposite end of the hole 😊

7:45 the mass of the object does not influence the acceleration therefore the maximum velocity calculation should not involve it. Still nice video.

Just discovered your channel. Love your delivery, graphics, and analysis. Well done!

I have actually pondered this question over the years. Thanks for answering it.

Your videos are always fun to watch!

8:05 You'll feel weightlessness not only at the centre but through whole journey.

@aintquitewright1480

Жыл бұрын

Right. You are literally in free fall. Weightless.

@darmajid9670

Жыл бұрын

@@aintquitewright1480 exactly

@maxpower1337

Жыл бұрын

Strange feeling I think.

Excellent! Thought about this 40 years ago and it's brilliant to see it animated and in such a humorous way. Very funny.

I LOL’d at the end especially. So entertaining and informative. Thanks for this gem.

I've sometimes tried to imagine what it would be like and just assumed that you'd get stuck in the centre for ever. The movie Total Recall (the newer one) has an interesting take on a journey through the earth. 👍

@5:45 It's much worse than that. Gravity goes down as you get closer to the center. The good news is that means the pressure does not keep increasing at the same rate as it does above the surface, but the bad news is that the reduced gravity and increased pressure will result in slowing down as you fall. It takes *much* longer than a day to reach the center, and you'll be stuck there once you arrive. @8:03 Fun fact: You'd actually experience weightlessness the *entire fall*. Weightlessness isn't the lack of gravity, it's the lack of "restoring force". Being in freefall is indistinguishable from being in 0g.

@truhartwood3170

Жыл бұрын

Yup I was looking for a comment already saying this and here it is!

@trevordick272

Жыл бұрын

Why does gravity go down, the closer you get to the significantly larger mass at the centre of the earth? Wouldn’t it constantly increase until you pass the core, then reduce as you continue through and past it to the other side?

@truhartwood3170

Жыл бұрын

@@trevordick272 at the surface of the earth, the entire mass of the earth is below you, so you have maximum gravity. As it says in the video, you experience no gravity at the centre of the earth because you have an equal amount of mass pulling you in all directions equally, so it all cancels out. The farther you fall, the more mass above you pulling you up, and the less below you pulling you down.

@truhartwood3170

Жыл бұрын

@@trevordick272 Even though gravity is decreasing the closer you get to the core, if you're in a vacuum you'd keep accelerating faster and faster until you reached the centre, then you'd start slowing down once you past the centre. That being said, while your velocity is increasing, your acceleration is decreasing due to the lower gravity. You'd be accelerating the fastest at the surface, and would have zero acceleration at the centre, with acceleration dropping smoothly all the way down until you reached that point of zero acceleration at the centre. If you're confused about speed increasing while acceleration is decreasing, think of being in a car - you accelerate the most at first, and as your speed increases your acceleration decreases. You might get to 30 in 3 sec, and then to 60 in another 6 sec. for example.

@truhartwood3170

Жыл бұрын

@@trevordick272 considering your question more, the density of the crust is only about 2.5g/cm³, whereas the core is around 13g/cm³, so you're right that the mass of the earth isn't evenly distributed from crust to core. And you're right that the gravity you'd experience from the core would increase the closer you got to it. I'm not a physicist but you may be right that you may initially increase your acceleration at first, maybe through the crust and maybe even the mantle, which is around 4.1g/cm³. But the outer core's density is around 11g/cm³ so not that far off from the inner core. And the outer core is 2,260km thick, so certainly once you got into the outer core your acceleration would start decreasing. And the inner core is another 1,200km thick, so your acceleration would be going down all through that as well as you got more and more of that super dense outer and inner core above you. So you might be partially right that your acceleration would increase the closer you got to the core, at least through the crust and maybe part of the mantle. But definitely once you hit outer core your acceleration would start decreasing. Where that point is would take way more computing than I know how to do or want to do!

You won't keep going back and fourth forever. You lose energy at each end and eventually just stop in the middle.

When you are in free fall you will experience *weightlessness* during the *whole* trip! Not just in the center of Earth!

Placing aside the currently impossible suits my theory would be... 1.) As you are falling you will mercifully begin to lose consciousness and be fully unconscious way before you burst into flames while being crushed. 2.) Though you've been long dead there will be an unavoidable point/consequence where the heat and pressure win out over your now unoccupied meat shell. You will be absolutely burned and crushed absolutely. Reducing you to powder. 3.) Plot twist! Life anew! All this will take place well before you reach the mantle. Still, the pressure at this relatively shallow point should (will) be enough to keep the dust cloud, that is you, together. This "area" of you will continue to be more and more compressed. It's here that I should remind everyone that humans are carbon based life forms. So all that remains of you now will be the carbon you was made of. Know what else is made almost entirely of carbon? As carbon dustball you falls farther and farther, heat and pressure continues to increase to near unimaginable amounts until... the Earth literally turns you into a diamond. How many carats you end up being will be determined by your overall body mass (height... weight... muscle density...). You're reborn as a diamond. All diamonds mined on the Earth's surface started as carbon deep within the planet under extreme heat and pressure. They then make their journey to the surface via lava tubes/magma chambers erupting. You may be lucky enough to do the same. Talk about your conflict and blood diamonds! I'm 5'8" with athletic build so I like to think that I would be around a 4 carat (since I can admit I'm not perfect) *near* flawless diamond. My new selfie y'all = 💎

@Soniboy84

Жыл бұрын

Wait, does it mean if we drop some coal into the hole on one side, it'll come out as diamonds on the other?

@thomasg4720

Жыл бұрын

No, cause the air in the tunnel limit your/the coals speed, so you have not enough energy to come out of the other side and after a few iteration get stuck in the middle.

@Lyken30

Жыл бұрын

@@Soniboy84 No... The coal would probably be diamond before it reached the gooey lava mantle but that's where it's journey would end (possibly only temporarily). The mantle is a viscose molten lava fluid. In this video's scenario the only way you would pop out the end over and over is if you don't interact with anything at all. An unobstructed free fall. Because if any resistance is met it will take energy away from your forward momentum. Meaning you would never come out of the other end due to loss of forward momentum. That's why this video need to use magic suits, tunnels (to stop any physical interaction with mantle and core. It also needed to be a vacuum tube. Even in my scenario the diamond made from you doesn't make it past the mantle. That's why I said you might get lucky. Luck referring to being shot back to the surface via lava tubes. Only way "diamond you" will ever see the surface again because you never make it past the mantle. In my scenario there's nothing preventing it from, at least in theory, happening. In fairness, the creator of this video was trying to bring you back alive with no injuries so precautions like suits, vacuum tunnel, no contact with mantle or core were required. Unfortunately there isn't a material on this Earth that the tunnel could be made out of that the mantle and core wouldn't instantly destroy with heat and pressure. Nor are there any materials the suits could be made of to protect you. In my scenario there is a 100% chance you would die to death. It's a one way trip (unless you get turned into a diamond and hitch a ride to the surface in a lava tube 100K to millions of years from now.

@mann_idonotreadreplies

Жыл бұрын

Cool story bro.

@Lyken30

Жыл бұрын

@@mann_idonotreadreplies That's the product of being bored with a built in good thought process.

You answered the question that i thought no one had except me in my childhood

I loved the video very much! Very well described! I agree with nearly all the things said, but not with the last, he will not fall for the eternity, his max distance from the center of the earth will decrease every time he will fall down again, there is air resitance and the change of gravity (that is higher at the center) so he'll fall few times and then stop at the center forming a perfect ball of liquid steel(if won't also transform in gas due to the high temperatures). But again! Great video💪🏻💪🏻

This was utterly amusing. I love that it just gave the straight, albeit impossible, answer.

I was hoping you'd mention that the 42 minutes 30 seconds would be the same travel time falling through a hole dug from any point on earth to any other point, providing the same features (straight, vacuum sealed, etc). NY to LA would cause you to accelerate and decelerate slower, so despite the hole being shorter, you wouldn't reach the same insane speed. Also, it's funny that the max velocity at the center of the earth happens to be almost the same as orbital velocity in LEO.

@TheRadiastral

Жыл бұрын

Actually it's not funny, but completely logical, since in both cases it's the mass of the earth causing the acceleration. The max speed while falling through the entire earth (and I mean through the center, along the diameter) is the exact same speed you would need to be in orbit at (or right above) the ground level, assuming no air, of course.

@RichM3000

Жыл бұрын

It would be more of a slide than a fall.

@DANGJOS

5 ай бұрын

​@@TheRadiastral The reason is a bit more involved than that, but still relatively simple. But the consequences of it means that this would only be true if the Earth was uniform in density. Because it isn't, this means that the maximum speed would not be the same as orbital (circular) velocity.

The air density would continually increase and lower your terminal velocity as you went down, so after passing through the center you would have almost no energy to come out of the center and fall back in. The assumes no temperature effects or other pressure effects like turning the atmosphere liquid.

@RichM3000

Жыл бұрын

True. With increasing air pressure and decreasing gravity, the diver might not reach the center, becoming buoyant but with velocity at a certain point, then losing that velocity due to air resistance (like a diver in the ocean).

@MGZetta

Жыл бұрын

I mean, if air exists in a vacuum, sure.

@rockosgaminglogic

Жыл бұрын

@@MGZetta because you're below Sea Level? LOL

@RichM3000

Жыл бұрын

@@MGZetta The hypothetical situations here had many parts. Some included our atmosphere and some stipulated a vacuum.

@MGZetta

Жыл бұрын

@@rockosgaminglogic because the video you watched explained the vacuum tube more than your brain cell numbers. Lmao.

There were a couple of good laughs in this one along with the good information. Good job.

Great timing My daughters were asking me this question, I will forward this video to them 😇

Fascinating, I wonder how much of the strongest material possible we would need in order to keep the structural integrity of the tunnel at various depths. Sounds like a nice little engineering challenge.

@nidhishunnikrishnan3079

Жыл бұрын

The temperature at the centre of earth is comparable to the temperature of the surface of the sun (just beneath the corona). So there you go.

@firetime75

6 ай бұрын

Звучит как нереальная задача!

Brilliant, fun and funny. Love 'em! Extra kudos on the sponcerships that are done so well, I actually enjoy watching them.

@DebunkedOfficial

Жыл бұрын

Thank you!

the graphics are soo cool !!! and towards the end, when the stick figure jumps endlessly up and down, I completely lost it !

With air in the tunnel, the terminal velocity would decrease as the pressure increases and the gravity decreases, so you would stop softly in the very centre.

One thing I'm still curious about: If the tunnel wasn't a vacuum, you'd have an increasing amount of air pressure that slows your terminal velocity, and you'd also have a steadily decreasing amount of gravity, which also lowers your terminal velocity. So if you just had a sufficiently capable pressure suit, how far would you actually fall? Unlike the vacuum, you don't just spring between the two sides, because you lose momentum due to gravity. So what's the furthest you'd fall before going back to the middle?

Very nice job on how you snuck in the sponsor “Norton’s VPN” within the video/storyline

That segway was great, gave me a genuine laugh

@DebunkedOfficial

Жыл бұрын

😁

And somehow they managed to make a version of Total Recall with one of these tunnels in it.

@DebunkedOfficial

Жыл бұрын

Indeed! 🤔

'one does not dsimply bore a whole through the center of the earth'

To explain the forces, the spring should be attached to the center of the Earth, not to the edge.

This was the premise of the reimagined "Total Recall".

Looks like the "world's" best ride.

love your videos!!

@DebunkedOfficial

Жыл бұрын

Thank you! We really enjoyed making this one!

Ngl, all you need is a cooking pot hat, goggles, some spoons and wood.

Thank you so much for the answer. I been asking everyone this for like 4 years and finally, I got answer!!!!

Who played Dig2China in my backyard?

My friend actually did all the calculations for this problem and said that if you drop a steel ball down this hole it would almost make it to the other side but not quite and would start back towards the center and as it approached it's starting point it would be a little further away than it was on the other side of the Earth and as it oscillated back and forth it would keep traveling a shorter distance until it finally was going back and forth through the center very close to the center and eventually would stop in the center. So I'm not sure you have your physics right. This friend of mine developed three patents on quantifying photons for Bell labs.

@cyalknight

Жыл бұрын

There is almost no such thing as perfect vacuum. You would probably loose some speed by touching a wall or the few atoms you bump against. Suggestion, have a higher entrance platform and a lower exit platform or rope to grab. If a large shuttle, have wheels that engage with rails once most all speed is lost.

@jakeg3126

5 ай бұрын

Yea he got that part wrong

@Debunked Great video, brain candy! Here's my doubt: Wouldn't it be (theoretically, due to conservation of energy vs. passing the earths center as a "reverse slowing effect" ) , that you'll come out of south hole with a very slight less(imperceptible) "height", so the up-down process won't be perpetual? Thanks!

One of the most entertaining videos I've seen in a long time!

@DebunkedOfficial

Жыл бұрын

Thanks! It's great to get comments like yours 😊

Never thought this idea needed debunking. Well... I guess there are flat earthers out there so maybe.

@nicholaosskiadas9083

Жыл бұрын

I am neither a round or a flat earther, I don't know what the trouth is. But forgetting all I have learned in school, spherical spinning earth with gravity, seems questionable.

@lucidmoses

Жыл бұрын

@@nicholaosskiadas9083 I can't follow you down the conspiracy theory rabbit hole. It’s not about who tells you what. Science is about sorting out all the conflicting stories by figuring out the truth of reality. You do that with test and experiments. Then you publish the results for all to check by explaining exactly how you did the test. They are not selling you anything and it’s up to you if you want to know the truth or not. If you don’t believe them you can do the test yourself. There are lots of different ways to check if gravity exists and how it works. All the different ways prove the one Theory of gravity is correct. Compare that to the conspiracy nuts. For any one aspect the have an explanation. Trouble is they have to keep changing their explanation for different aspects of the same thing. So what does it prove when their explanations contradict their own other explications. Yet most of them don’t even prove what they set out to prove if you examine them even slightly more closely then they present. It’s all a house of cards that comes crumbling down if you just think about what they said. So it’s up to you. Your either interested in the truth about reality or don’t want to think about it.

@ct92404

Жыл бұрын

@@nicholaosskiadas9083 conspiracy theorist nut

@nicholaosskiadas9083

Жыл бұрын

@ct6502. 6502 are probably the loose screws in your brain.

@ct92404

Жыл бұрын

@@nicholaosskiadas9083 Go back to looking for your magic "dome" or "firmament" or whatever. 😂

I disagree with the air pressure argument. If you dig through the earth, you aren’t creating more atmosphere so it should still weigh the same amount. For example, when I am standing on flat ground, the atmosphere above me is less distance than the atmosphere to all sides of me but I’m not being squeezed more on my sides by the air than I am on top of my head.

@timmo971

Жыл бұрын

Gravity isn’t pulling on you sideways. It is vectoring towards the centre of the planets mass. It is why you would be crushed at the bottom of the ocean. Infact I would not be surprised that atmospheric gases themselves be crushed together so much they liquified and even solidified.

@ehb403

Жыл бұрын

It’s the weight of the air column over you. In your tunnel, you’d now have a taller column over you; while it’s true that the entire atmosphere would have contributed to filling the tube, the impact on the distance to the top of your column of air would be negligible. Of greater impact is that the increase as you descend would be reduced as you approach the core so the increase halfway down would basically be half as fast as at the surface and only 1/4 as fast 3/4 of the way to the center; although denser air weighs more so even this is a simplification. Math homework everybody!

@changsangma1915

Жыл бұрын

@@ehb403 ......what of sort of speculative math?! A result from calculated computer simulation of the hypothetical scenario or a really good imagination flex with numbers sprinkled over to mean something that has no ounce of empirical proof?! The guess are just as good as the video tried, but lack all sorts of believability on a irrelevant scientific thought process...like making a hole through a planet is even logical to begin with.

@ehb403

Жыл бұрын

@@changsangma1915 no speculation. Read Newtons “Principia”, gravity decreases linearly to zero as you descend into a spherical body. Not saying the TOTAL would not be higher, only that as you approach the center the INREMENTAL contribution would decrease to zero. Also, that no “extra” air is created to fill the hole - it reduces the atmosphere outside the hole.

@changsangma1915

Жыл бұрын

@@ehb403 .......is that the best you could use your intelligence to make tangent response to deflect from the questions put on the so called debunk of the most unrealistic piece of sci fi argument?! It falls on the line of arguing Star Trek wrap travel physics....speculative guess game.

Maybe the best take on this thought experiment yet seen. Ty

6:00 that was the funniest script for nordvpn advertizement ever. You placed the viewer nicely in the role or a falling person who uses the phone for irrelevant things for entertainment and therefore legitimized viewing the ad. The ending where the branch broke was an excellent metaphor for the contradiction of physical forces at the grand and small scales

If you travel through the earth indefinitely, wouldn't that be "indefinite energy" which is impossible? I think it would behave more like a spring and have you bouncing from side to side but each time you would fall back further away from the surface and you would end up floating in the middle of the tunnel.

@RichM3000

Жыл бұрын

The moon orbits the earth on the same principle. It is gradually moving from the earth, but it isn't losing energy like a spring system.

@drcyb3r

Жыл бұрын

@@RichM3000 Outside of the earth there is a vacuum or at least no air. If you would travel through the earth, there would most likely be air and thereby friction.

@RichM3000

Жыл бұрын

@@drcyb3r Partway through, the video specifies a vacuum. With air resistance, the jumper might not even make it to the center due to extremely high air pressure and lower gravity.

@Theone-ry4de

Жыл бұрын

@@drcyb3r Pay attention to the video my guy

@michaelquigley1411

Жыл бұрын

Your converting potential energy to kinetic energy on the way "down", then vice versa on the way back "up". But total energy remains constant.

Idk. It'd probably hurt or something. But I'd rather fall through the Earth rather than have a conversation with anyone.

@sandboy5880

Ай бұрын

Edgy asocial kid.

it's kinda fun though, popping up on the other side of the earth every 42 minutes, for eternity 😂

just came across this channel today.. great presentation, entertaining and engaging.. will definitely be showing my three sons 🤣🤣

@DebunkedOfficial

Жыл бұрын

Thanks very much!

When the entering and exiting points are in the north and south pole, the landscape should be very icy. Also, since the mass distribution of Earth is not perfectly uniform, the resulting harmonic oscillations would feature some irregularities. Further, the air pressure decrease in the tunnel is not a reasonable one because air falling through the tunnel would act very differently than it does in the surface.

Also Worth noting: With Air Resistance you wouldnt technically make it fully to the other side because as you said you'll lose your potential Max-speed to the air around you while falling, meaning with less speed due to the air resistance you might be in the end just stuck in the pipe Because of your lacking Acceleration you might in the end be stuck in that pipe for giving that Impulse of your kinetic energy to the air molecules around you, and with less kinetic energy you would end up in a Position where you will have less Potential energy than in the beginning when you jumped

Just amazing! Thank you!!

One question: since the atmospheric pressure rises with increasing depth it also means that the density of the atmosphere rises which means that you’re not only producing an incredible amount of friction heat it would also mean that your fall slows down to almost a standstill due to the density of the atmosphere. It may even result in you’re reaching a point when you’re just swimming in the atmosphere because you’re not heavy enough. Or is there anything wrong with my train of thought here?

@Gavin-ii7ho

8 ай бұрын

its why meteors burn in the mesosphere and the way down because the atmosphere starts to get thicker, and they are moving extremely fast..

Small correction: you would experience weightlessness all the way, not just in the center. That’s the reason why gravity is not a force, BTW: a force would feel like weight.

This thought experiment has bothered me for years. Thank you.

“…or you could just, grab on to the side or something” was somehow one of the most encouraging things ever said.

Now THAT'S ironic. This VERY THING happened to me last week.

The first bit should’ve been “not looking your way”. That would be a perfect rhyme

Is the oscillating back and forth from one end to the other actually true? I always imagined it that once you pass the center of the Earth the gravitational force will be acting in the opposite direction you were initially falling which would cause you to start slowing down. This slow down would make it so that you don’t actually reach the other end before being pulled back towards the center of the Earth again. With each passing of the center, your velocity and maximum distance away from the center would gradually decrease until eventually you just get stuck at the center. I’m having trouble understanding why or even how you would be oscillating back and forth from each end for all eternity.

@mooseyard

6 ай бұрын

Because without air resistance there’s no friction to carry away energy, so you would in fact keep repeating the same oscillation forever. It’s the same reason the planets have been orbiting for billions of years without falling into the Sun.

some one give his man the best VOICE ACCENT/ VOICE ACTOR / VOICE every award

Good animation lol. Would you keep going back and forth forever? I guess maybe because you're in a vacuum? Or is there any other force at work that would slow you slightly so eventually you'd get stuck floating in the center forever?

@nejc3568

Жыл бұрын

It's because of perfect vacuum so no friction. However, every time you touched the walls of the tunnel you would loose some energy to friction. So you would get stuck in the center eventually. You would touch the walls eventually because the Earth's gravity is not completely uniform due to the Earth not being completely homogeneous. Unless it was a sufficiently wide tunnel. In that case, you would fall forever, just like the Earth falls around the sun forever. No friction means no energy loss in this case.

@hf6553

11 ай бұрын

Even if it was a vacuum, I still think the fact that once you pass the center of the earth the gravity force being acted on your body is in the opposite direction of your fall so it would slow you down enough so that you don’t fully reach the other end before falling back towards the center, and each time you fall past the center you lose a little bit of speed until eventually you get stuck in the center, even if it was a vacuum.

@jasonmack760

6 ай бұрын

​@@hf6553Nope. Gravity is not a force technically, it just has effects that are measurable *like* a force. So, its effects are mathematically uniform in this hypothetical system. You'd need some manner of outside force to slow you down.

This sounds like fun. I'm gonna get a shovel and start now.

That was brilliant. I´m starting digging right now

@DebunkedOfficial

Жыл бұрын

😆

the best but darkest ski diving experience you’ll EVER have…sign me up

This video was a lot of fun

PLEASE…I pay for no ads on you tube. Burying an ad into videos is a violation of the contract I have with this service.

lol I had to keep pausing since I'm at work, but I greatly enjoyed this video. I'll have to watch it again tonight because I know I missed things.

This AD is so seamlessly implanted into the video, smooth

are you sure you got the air pressure right?

I would say by simply jumping you would never get to the other side since air resistance makes it so you would stop early and fall back which would make you end up at the center after a lot of up and down .... kinda like a swing

Well provided you break reality in several different ways, I think you just pioneered travel!

Gotta say if it was temp and pressure controlled. I would jump in lol see how many times I could oscillate back and forth before I couldn't take it anymore. Be one hell of a ride.

If you drill that hole wide enough, the entire earths atmosphere would fall into it. That would FUBAR us all

@hata6290

Ай бұрын

WHAT HOW. Also what does fubar mean

@sikliztailbunch

Ай бұрын

@@hata6290 Well. Air has weight. That´s why we have an atmosphere. Gravity takes care that our atmosphere stays on the ground. If you dig a hole wide and deep anough, our atmosphere would just fall into it, leaving us with no air to breathe. Hence, Fucked Up Beyond Any Recognition (FUBAR)

It's interesting that the velocity you would hit at the center of the Earth is right around a minimal orbital velocity as well. Also you would not bounce up and down forever even if the tunnel had a perfect vacuum. This is because that changes in gravity will impart tidal forces on your body and those forces will ever so slightly rearrange some of the mass of your body (moving atoms around) and that movement will convert to heat that will be lost due to entropy. Since you can't get something for nothing that lost energy has to come from your velocity, so each trip will get progressively slower. I will grant that that this would be effectively considered indefinitely as long you consider indefinitely to be less than infinity.

As I remeber, if you make path from any point on surfeace of earth to another point on surface on earth, but not necessarily via center (eg. From New Your to Sydney or Tokio to Paris ...), time of free fall should take same time. If theoretically there was a way to travel like that, then it wouldn't matter where on the planet you go, it would always take ~42 minutes.

The way the sponsor was smoothly introduced, I just had to sit right through it 😮‍💨

God bless you. For thirty nine years this problem has plagued my mind

This is great. Loved it.

Great video! I did the mind experiment during COVID lockdown and came to the same conclusions. Assumptions: Vacuum. Pole to pole to avoid the coriolis effect. Homogenous density. (Although I suspect that if each layer is homogenous and geometrically consistent within the sphere it wouldn't matter) Ignored high temperature at depth. I didn't make any allowance for the mass of the victim/experimenter because I don't think that this is relevant. The acceleration due the gravity is the same for both a feather and a brick. Perhaps I'm missing something. I did some crude calculations but they've been lost. I agree that you would finish up oscillating back and forth for ever always reaching maximum speed and zero acceleration in the middle. This also begs the question. Would you be younger at the far end but then be equally older at the near end due the relativity? Or simply just get younger and younger?

The idea of being in the middle of that tunnel with all that enormous mass around you, gives me the creeps..

That ending had me rolling 🤣🤣

9:28 the spring anchor point should be in the middle of the earth. As you are getting closer to the middle. The tension force gets smaller and smaller. Till you pass the anchor point. The the tension point will start to build up gradually again. From your video. Anchoring from the entrance starts to build up tension the moment he leaps into the hole.

educational and entertaining as usual 👍ps narration 🔥🔥

Exactly what i expected 🙂 Will be difficult to cool down the tube in the inner core though liquick iron ...🙄

Using a spring connected to the center gives the correct math for motion through the Earth. Fun fact: if you fall through the Earth with an initial velocity, your orbit has the exit the Earth at some point.