Billions of micro organisms passing through the hose and pump had awesome roller coaster ride.

@MythiPlayz

8 жыл бұрын

ikr

@SkywardPvP

7 жыл бұрын

Xiaoke Ding lol

@kareemsalessi

4 жыл бұрын

High-pressure probably killed them all!!!

@kareemsalessi

3 жыл бұрын

@@shitbox10yearsago65 For related "Science" click on my name!!!

@frozenturtl827

2 жыл бұрын

@@kareemsalessi no

I love that you showed the failed experiment with the skateboard and fire extinguisher, failure does not mean the science is bad, it might means the engineering is bad. The reverse is also true, bad engineering can lead to validation of bad science, like the many peoples that think they have achieved free energy/perpetual motion. I'm thinking of the people who genuinely believe they have achieved those things, not the scammers.

@iwbmo

2 жыл бұрын

@@Macsuckks yes you have mentioned their username

OMG 2:41 That is one of the most gorgeous photographs of a Sukhoi I have EVER seen. The camera angle, the colors, the visible condensation in the wingtip vortex, man it's perfect!!!

@TikhonSuslov

2 жыл бұрын

Looks like a render. Hope it's not though

@J.A.huscher

2 жыл бұрын

@@TikhonSuslov it could be the jet flying past a drone with a very good camera

"It's usually a good idea, unless you're in the path of a jet ski." And I the only one that flinched?

@lazarus6636

4 жыл бұрын

*Y E S*

@keithou4389

3 жыл бұрын

yes...

One thing you forgot to mention, that is making WaterJet slightly better than a regular jet. The thrust generated by water going down is not the only thrust you get. Water coming up to you also carry a momentum pointed vertically UP. And as it get a momentum pointed down, is has to give YOU it's former UP momentun first.

@ThePrufessa

4 жыл бұрын

Wrong. That's not how it works. There is no water with momentum coming up towards him.

The force is strong with this one.

You're trying to explain to me how "Rocket science is one of the most complicated.....", but I'm too distracted by you merrily floating around with a huge grin on your face and a jetpack strapped to your back.

@ThePrufessa

4 жыл бұрын

Actually the science behind rockets is quite simple which is what he was conveying in this video. Rocket science of figuring out how to use rockets for traversing through space. You can make a rocket out of common household products like matches and aluminum foil so the science behind how rockets work isn't that complex.

@vedantsridhar8378

2 жыл бұрын

yep exactly. Yep exactly. Yep exactly. Yep exactly. Yep exactly. Yep exactly. Yep exactly. Yep exactly. Yep exactly. Yep exactly.

I don't see what's soo damn great about it, Chuck Norris does this every time he pisses.

When I use my phone, I experience 4g force. How about that.

@KINGDANIS1337

9 жыл бұрын

LOL you made my day x'D

@AakashKalaria

9 жыл бұрын

Here in India we wait for cheaper 2G and reasonable 3G rates...

@afswan

9 жыл бұрын

LOL

@SamHipZZ

9 жыл бұрын

LOL

@ILikeWafflz

9 жыл бұрын

Alexandre Boucher LOL Props on that one.

Super Mario Sunshine.

@Tylerthety

7 жыл бұрын

I was about to say that!

This is probably the best video you've ever made. The video is in my opinion the perfect length, and the narrative and visuals are just excellent. Lastly, it's very inspirational and makes you curious to find out more. Great job Derek, keep it up!

This video was AWESOME!!! I love videos that are fun and educational. Keep posting because these are the best!

what does Jetski taste?

@Cosmalano

9 жыл бұрын

Corn.

@FSXgta

8 жыл бұрын

EpelepticMoon Blood

@naufaladi.youtube

8 жыл бұрын

jetski

@AxeAR

4 жыл бұрын

_Blood_

thank you for making science SOOO fun:)

this reminds me of F.L.U.D.D from super mario sunshine

Holy crap the guy riding the fire extinguisher cart at 1:44 was my physics professor! Shoutout to Mike Young

They actually do have some throttle - they reduce the power down to 70% to limit max stress on the craft as they're accelerating through dense atmosphere

It's not upwards, it's horizontal - and at that point I imagine you're 'falling' vertically. It's on the NASA graph if you look carefully.

6:48 is priceless haha! Bet that jet ski wiped that smile off your face.

"You just kinda need to trust that the jetpack will get you out of any trouble." I will live by this.

You have to get up to speed by the time you reach orbit so you don't really have much choice. But 3g's is not so bad that you'd really risk blacking out

Quality stuff as always! :) However you did say that most of the acceleration of a space shuttle in orbit is horizontal. I think it needs o be noted that this true for its ascent but not for orbit. I understand that this video isn't supposed to go too deep into the topic, but to be in orbit, the space shuttle experience a vertical (centripetal) acceleration of 1g. If it accelerated horizontally once in orbit, it would leave orbit. It accelerates horizontally UNTIL it is in orbit.

To help clarify what he meant by F=(m-dot)*v, think about the units. m-dot is the rate of mass, as he mentioned, and would have the units kg/sec. This describes the rate of mass ejected from the fire extinguisher. To describe a force, this rate of mass must be multiplied by velocity, rather than acceleration, because 1 (kg/s)*(m/s) = 1 kg*(m/s^2) = 1 Newton. The dot is a notation used to describe the derivative. Hope this helps. :)

You certainly have a great sense of humor. And great teeth too. So glad you didn't lose them. funny and fun.

SUPER MARIO SUNSHIIIIINE! woohoo!

+Veritasium Thanks for risking your bright shiny teeth for making this video.

I love people that spread knowledge, thank you.

That intro of him trying the water jetpack is the greatest thing I've ever seen.

when i clicked veritasium 2 it sent me to a website called buy instagram followers XD

@h0lstein121

7 жыл бұрын

lol me too ??

@plopplop5218

7 жыл бұрын

lol

@Subject914

7 жыл бұрын

yep I think that's the problem with really short urls(idk tho)

@suwinkhamchaiwong8382

6 жыл бұрын

xD

"You know the feeling when you take off on a plane?" Cant relate😢

@lazarus6636

4 жыл бұрын

Oo thats deep

@stevewinwood3674

3 жыл бұрын

Overrated. Go ride a greyhound bus then make the seats smaller by %20 and make the windows really really small then remove your ability to get out of seat and go to bathroom when you want because the isle is so narrow. Commerical airplane travel is horrible. and don't forget to throw in if the plane breaks then you die.

Was just picturing the converstion: Other Person: "Damn mate, what happened to your face?" Derek: "Well, i collided with a jetski while flying my jetpack."

This man teaches me things I never would have learned in my life...

He sorta reminds me of the Property Brothers...Great video

7:31 AHH! Derek has a second head!

the best part of this video was learning that if someone goes down fast enough theres a redout

This guy is over-structured. After a few minutes into, the first viewing of this video my eye's glazed-over. So,much in fact that, I had bucking of tears squirting from my eye sockets and the last thing I remember were sparks all over the place. After I got out of the hospital with 3rd degree burns do to the electrical fire- I vowed to write this review on my new computer.

If you redesigned this machine to recycle the water that was expelled and fed back into the intake, could this fly independently? You could add a turbocharger type device to a) increase the pressure of the water going in and b) slow the speed of the water coming out so that it doesn't counteract the thrust. Can anyone please explain if this wouldn't work and why? Thanks.

@willoughbykrenzteinburg

9 жыл бұрын

It wouldn't work. It would be like bringing a box fan onto a sail boat and trying to create your own wind. While the wind hitting the sails would act to push the boat forward, the fan itself would create an equal amount of thrust in the opposite direction counteracting the push from the wind. The same kind of logic would apply to your scenario. While the water being expelled out of the jet nozzle would provide thrust, it would ultimately be redirected back into the intake, and that process would create forces that counteract that thrust, and you'd net to zero. In other words, the very act of slowing the water down in order to bring it back into the intake would create a force in the opposite direction negating the thrust.

@Bobdibob

9 жыл бұрын

Willoughby Krenzteinburg Gotcha, thanks. I was hoping to dispel some of the energy somehow before it reaches whatever mechanism is drawing it back in, but I guess not being able to create or destroy energy would apply. Thank you for your reply.

@Bobdibob

9 жыл бұрын

Willoughby Krenzteinburg Gotcha, thanks. I was hoping to dispel some of the energy somehow before it reaches whatever mechanism is drawing it back in, but I guess not being able to create or destroy energy would apply. Thank you for your reply.

@petersmythe6462

9 жыл бұрын

Because the intake would slow down the water, and therefore the device, thus, instead of a rocket, it becomes more like a wheel.

@ninja_goose4360

9 жыл бұрын

There would be a force downward on the intake which would cancel out the upward force therefore, no flying

Dear Santa...

Great job keeping it simple yet very informative. My 9 yr old can now boast about the physics of rocket science!! Thanks!!

They way vsauce goes off topic is very planned out. They cover things that are related to the main question and I very much enjoy the way he bridges the questions together

Why don't they build an elevated platform on the top of a mountain to launch rockets into space? Each additional meters seem to be extremely expensive…

@pavelZhd

10 жыл бұрын

One thing is... mountains tend to have slightly greater Gravity around them... but that is actually neglectable... Or at least not that important as having less air to cut through. Mostly that is not reasonable, because before launching something from atop a mountain, you have to DRAG all this stuff UP to a mountain. Do you have any idea how much rocket boosters weight? And they ususally are something you can not cut into parts and re-assemble on the launchpad. All that extra cost really outweights the cost of extra-fuel you have to burn to cut through atmosphere. ((Though

@symbolxchannel

10 жыл бұрын

Павел Жданов I think what you say is only a hypothesis… It may be wright, but I am not convinced…

@jmredlight02

10 жыл бұрын

The problem for a rocket is not going up. It is going fast enough to achieve an orbit, they need to get 7/8 km/s for a LEO for example !

@symbolxchannel

10 жыл бұрын

***** The problem is both distance and speed (& acceleration)… The closer you are to destination, less fuel is needed. (And less fuel is needed to bring the extra fuel… A thing usually underestimated!)

@pavelZhd

10 жыл бұрын

***** You might be surprised, but most of fuel (like 2/3 in case of Shuttle launch) is burned before a rocket starts gaining any orbital speed. Thick atmosphere generates a ton of friction (a.k.a. Air resistanse) and that means that exiting thick atmosphere a.s.a.p. is a good idea. And the bes way to exit atmosphere is to go straight up and then ditch the accent stage and burn insertion stage.

Super Mario Sunshine, anyone?

@CartoonKidOLLY

6 жыл бұрын

Dylan Nylan yes!

4:26 I really enjoyed that 😂😂😂

I wish my math teacher would have been this fun, maybe I would have had the math skills to understand more of the science I love :)

F=mv isn't correct. It's supposed to be F=ma

@ryansheffield7088

9 жыл бұрын

Yes it is correct, he is referring to the force due to momentum

@MattLevonian

9 жыл бұрын

It's F = dm/dt * v, that's what the dot means.

@supersaiyangod4077

8 жыл бұрын

+Matt Levonian Newton's 2 law

4:19 "Stacked on top of you - OHH OHH YEAH - hey how're you DOWN BELOW HUH? - AH you guys ARE HEAVY, OH MAN PHEW" #HaHGayyyyyyyyyyyyyyyy

@wouter375

9 жыл бұрын

xD I was waiting for this comment to po up LOL

@xyzabc9628

8 жыл бұрын

+Diego Pomares i was certain there would be a genius to point out

@veritasium i had a que that in 0g we will feel more tired or less tired than here on earth if we are running?

@devchandak9851

2 жыл бұрын

Sir pls answer

Love the C02 experiment!

5:33 look at his eyes *hits weed*

When I was a kid I wanted to be an astronaut. Now I'm afraid of height and water. Fun to watch the videos! thanks

Finally an explanation that makes sense! I got all of it- Great Video

Actually what's interesting is that as you go up out of earth's gravity, the force of it actually lessens. So not only does the weight of the fuel change by the amount used, it also changes by the height of the rocket itself.

"it's a pretty incredible experience" watching this video. :) also,thank u for clearing the "atmosphere pushing" misconception-which had that before this vid.

If ever granted the opportunity, I am most definitely doing that in this life time!

I have a question about your explanation of the jet pack. You said that the force of the water changing direction from going up to going down is what pushes the jet pack up but when I was a kid we had toy water rockets. Fill it half with water and half with air. Pump up the pressure in it and when you release it it would take off. No turns in the exhaust, if you will. You also feel that with a water hose.

Great Channel! glad i discovered this..

had to share as I saw homeschooling friend Kelly at kidsmarket--we love science

Great post. I really like ur way of explaining simple stuff.

This was very cool, I think you did a good job explaining this topic.

Shoosh with your dialogue and just give me the jet pack already! LOL.. so fun!

Cara você é incrível. Muito Bom !

F=ma. Therefore, if you change the subject by dividing both sides by "m", you get F/m=ma/m, where the m's on the right side cancel out to give you F/m=a.

I love how he sees himself failing with humour that's how u really need to approach things !!! gj

great video!@3:41"it increases at an increasing rate" haha xD

The m-dot as part of the formula he described was the "rate of mass". It's the derivative of mass and its units would be kg/sec. This would satisfy F=ma. I hope that explains everything.

YES! I had a Toy as a good that was a balloon thing hooked up to water spouts - which you plugged into your garden hose. it was the coolest thing ever! I have often daydreamed about having one again, heh -- and about a human sized one like this. Awesome

2:33 How did you make the balloon look like that? like with the ears or whatever is on the balloon

is there a normal force involved because the water in the jet pack is pushing against the water? Is that why you can move at constant velocity?

Force is actually the rate of change of the momentum of the centre of mass of your object, where momentum is P=mv. So, force is actually = d(ma); [d indicates the rate of change or "first order derivative" of the variables]; So, I believe that you can't really negate the effect of pressure that contributes towards the velocity, i.e., the velocity of the exhausted gas changes reduces as the pressure in the chamber falls.. So, I believe that the equation shown should have been *F=**_d_**(mv)*

The principle is simple enough: "Push stuff one way so that you go the other way." The difficulty is the engineering--making it work in a controllable manner.

Probably this will be only comment about your sound design.. amazing sound design

Finally! A question I had since I was 8 has been answered! 7:09 Thanks Veritasium!

They should show this video in science class.. I learned more from this video than I did in science class lol

Closest? Okay, how was that not flying? honestly that was brilliant!

3:30 - Even better, the thrust actually slightly increases, because the Isp (specific impulse) will increase as atmospheric pressure decreases, while fuel flow remains roughly constant. Even more g's for the astronauts :-)

Hi I have a quetion will a space shuttle take off even in vacuum environment.

Speaking of common misconceptions, the retardant leaving the extinguisher does not make you go forward. The previously balanced pressure inside of the extinguisher becoming imbalanced as the valve is opened makes you go forward.

You sir, have just blown my mind!

That is a good point but I heard an explanation some thing like higher altitude equals higher gravitational pull so it would require more force from the rocket to take off and gain speed. I don't know if that's right might be just because they don't like the cold weather on top of a mountain...

Is the water free or did you have to make it? and how much yarn does it take to power the off switch? It needs more Cadillac.

2:22 "the balloon represents your harder parts" hehe..okay im done //slapped

Can you tell me that where the power supply and water pump are located in the jet pack? I am really curious about the machine works instead of the most basic physics.

I LOVE THIS kind of stuff great job man ur really smart lol

Hold on till the last.... Makes many concepts clear..(and interesting too)....!!

Finally understood the throttling down when spacex's rockets reach Max Q

i have a question, every time a spaceship fly it push the harth rigth? so if its fly in the day, the world get away from the sun(a very very small amount) and making the day longer? and if that is right, every time i jump in the day the world get away from the sun(a REALLY SMALL AMOUNT). its that right?

@seigeengine

9 жыл бұрын

elay barlev You were okay until you started talking about days. The length of the day is not related to how far we are from the sun, but how fast the Earth is spinning. And jumping wouldn't help because then your gravity pulls the Earth back that tiny amount you gained while jumping away.

The trouble with getting to space isn't that it's far away... it's frighteningly close from a certain perspective... it's that in order to stay in space once you get there, you need to be moving at orbital speed. The earth is spinning, and the fastest part of the earth is the equator. So being close to the equator is of greater benefit than being up a mountain.

No, the (dot) is part of the variable. m(dot) is just a way of notating the change in mass. It could also be written (delta)m.

it took an 8 minute video to explain something that 12 years of science teachers could not.

F=mv? You must be a genius!

i really wanna know where you went and did this

Acceleration can be a neutral constant, providing enough force versus resistance (gravity) to equal 0. Therefore, hovering or maintaining a position relative to another object or place. (I hope I explained it right!!).

0:46 remove some excess divergent shape nozzle so that you could accelerate enough. That long divergent exhaust nozzle i'snt design for acceleration.

1. GREAT video 2. AWESOME explanation 3. I want one of these 4. THANKS for nothing , cause now my brain hurts from all this info 5. hope your lip feels better 6. repeat step 1 & 3 as needed

keep up the good work man.

That is correct. However, in instances where the instantaneous change in mass is equivalent to the average change in mass, you could use either m(dot) or (delta)m. I oversimplified a bit, I suppose.

Yes, you'll continue moving with constant velocity, but you still need a small constant force to maintain it, because air friction, and friction with the hose on the water will eat away at your velocity.

Nerds dont even need to invent. They are fun loving curious people who have a sense of adventure. We want to help people enjoy life, rather than put them down.

I see where you are coming from, and I understand your confusion; I was a bit thrown for a second at first as well. What he actually wrote was F = (m dot) times v , where m dot stands for rate of mass expulsion (kg/s) rather than just plain old m, which stands for mass (kg). With m dot, the units work out, because force in Newtons is (kg m/s^2) and m dot times v is (kg/s) times (m/s), so you end up with (kg m/s^2). :)

0:16 someone please tell me where this music is from , i knowni heard it somewhere . my guess is a game (a cute one) or maybe a ringing tune. i think its a game bgm, please someone