When I was kid, I didn't think 100% humidity meant 100% water vapor, I actually thought it meant 100% water! So, you can imagine my confusion when humidity reached 95% and I didn't see any amount of water remotely near what I expected.

@philhahn

2 жыл бұрын

stepping outside expecting to be living best spongebob life haha

@karl-emilmadsen5032

2 жыл бұрын

100% humidity just means that the air has solved all the water it is able to, at current pressure and temperature, so a decrease in temperature will make the water condense.

@spiderdude2099

2 жыл бұрын

@@karl-emilmadsen5032 yep, it essentially describes the percent saturation of the atmosphere with water vapor.

@Korupt0

2 жыл бұрын

LMFAO. I thought the same thing when the world was still mysterious & magical😅

@PlasticSinks

2 жыл бұрын

Samee, I thought I'd be able to swim

this guy is like backyard scientist but not based on intuition

@calebsmith5550

2 жыл бұрын

Dude, even down to the shirt and sunglasses. Alternate realities confirmed!

@gottaproxy8826

2 жыл бұрын

hmm I'm confused by your usage of the word intuition. Are you saying his methods are counterintuitive?

@bluethumbbuttoneek9465

2 жыл бұрын

And not a backyard

@elliott7268

2 жыл бұрын

Wtf do you mean "not based on intuition"

@Ithirahad

2 жыл бұрын

this guy is like backyard scientist but based

Great presentation. In scuba diving we were taught that one ATM (atmospheric pressure) is the equivalent of 33 ft of water. Therefore at a depth of 33 ft your total pressure has doubled, tripled at 66 ft, quadrupled at 99 ft etc. Your 396 inch hose height divided by 12 equals 33 ft.

@haroldwheaton985

2 жыл бұрын

132=5

@haroldwheaton985

2 жыл бұрын

°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°°=1094

@kentworch

Жыл бұрын

Indeed. That's also similar to what causes decompression sickness (Barotrauma) when coming up to fast when diving deep. Dissolved gases like nitrogen in your blood can begin to boil.

@Knobelbernd

Жыл бұрын

Or you could just use metric where it is much easier: one atmosphere (1bar) every 10m.

5:20 "Yay metric". Proceeds to do calculations in pounds per square inch and inches of mercury 😂

@microcolonel

2 жыл бұрын

I mean... I live at 6000ft elevation. Water boils closer to 200°F than to 100°C.

@mortache

2 жыл бұрын

Well those calculations would be easier in metric

@willhendrix3140

2 жыл бұрын

@@microcolonel Almost had me fooled there, until I saw your units😂 PSA:200F=93⅓C

@willhendrix3140

2 жыл бұрын

​@UCHnkL9L8zSUVaZvsbeTuHAQ No, I was about to correct micro, that boiling temp is lower higher up, but 200F is indeed a reasonable boiling point for 6000.

@microcolonel

2 жыл бұрын

@@willhendrix3140 never seen a whole number fraction in a Celsius temperature holy fucc

1:43 Did anybody see a big obnoxious yellow-green arrow, instead of a green one?

@Plazmium

2 жыл бұрын

i think youre colour blind

@ethangbb

2 жыл бұрын

The cap on the bottle is green, right? The arrow looks yellow green compared to the cap

@shrimpflea

2 жыл бұрын

Color is subjective.

@My_initials_are_O.G.cuz_I_am

2 жыл бұрын

@@ethangbb It is, indeed, yellow-green. These two are trying to gaslight you.

@hexagon8899

2 жыл бұрын

@@shrimpflea thats the dumbest thing ive ever heard

I'm VP and past-president of the Astronomical League, an 18,500 member national federation of astronomy organizations in the U.S, and also a former ISEF judge. I have to say that your videos are just brilliantly produced but, more importantly, convey an enthusiasm for science that is completely infectious. I really want to commend you on your work with these videos. If you delve into any astronomy related projects, we'd love to have you speak at a convention sometime. We'll be in Albuquerque next year (doing virtual this August). I just subscribed to your channel and will recommend it to others..

@AlphaPhoenixChannel

2 жыл бұрын

Thanks for the fantastic review! Not sure what kind of availability I'll have to speak (just defended and moved across the country), but I can guarantee I'm not qualified to talk to the Astronomical League about astronomy directly - it'd have to be something oblique :) I have made a lot of astronomy-themed videos though, and my dad has a Master Observer plaque in his office! (If you were handing out awards in Bethesda a few years back, you may have seen me and my mom in the back with a camera.) He currently spends a lot of time looking for objects on the NEO confirmation list. Space-themed video playlist: kzread.info/dash/bejne/c3V-tqqsmrzVgKQ.html my dad's observatory: kzread.info/dash/bejne/nGWgzrmnmLuXXcY.html

Great video! You did a good job of accurately explaining things without giving inaccurate but broadly sort of correct explanations which drive me crazy coming from a chem engineering background (those things that aren't entirely wrong but just aren't really correct). Everything was spot on and easy to understand. I even learned some stuff which I wasn't expecting. One thing is point out when talking about the upside down bottle is that the bottle holds up the atmosphere above it, so water pushes up into it because in that area the atmospheric weight it held by the bottle.

@AlphaPhoenixChannel

3 жыл бұрын

Glad you liked it - The bit about the bottle holding up the air is a fantastic way to phrase that!

Just do it in meteric. On a nice 20°C day with 1030 hPa Atmospheric pressure water has a vapor pressure of 23,4hPa so it will boil at 10,066m. Much simpler.

@voxelfusion9894

2 жыл бұрын

To explain the simple math: Pa(scal) is the unit for pressure, defined as Newtons / square meter. h means hecto, which is the prefix for a factor of 100. Subtracting the two pressures, we get 1006.6hPa of pressure the water needs to balance out. Water has a density of roughly 1kg/cubic decimeter, which equals 1000kg/cubic meter. 1kg of mass exerts roughly 10 Newtons of force, likewise 1000kg exert roughly 10kN. Plugging that into our previous result, we get: 1006.6 *100 Pa / 10,000 Newtons per cubic meter. The newtons in Pascal cancel out, and the cubic meters cancel out square meters, leaving us with the final number of: 10.066 m Very easy.

@sps8684

2 жыл бұрын

🗿

@kelly4187

2 жыл бұрын

Everything is easier is metric. Then again American scientists know this, given that the country signed the Treaty of the Metre and the NIST defines all units as "SI units with an appropriate conversion factor".

@thelordz33

2 жыл бұрын

Where would he get a ten thousand meter tube?

@felixb.1756

2 жыл бұрын

@@thelordz33 well here in europe the comma marks the decimal numbers so 10,066m = 10.066m

I was hoping you'd walk back down and re-condense the steam...

@tgypoi

2 жыл бұрын

That would be cool. Theoretically it would all go back to how it started, but I'd like to see it actually happen.

@twoartistic

2 жыл бұрын

@@gregoryford2532 those gasses condense under pressure. Going back down the stairs increases the pressure inside the system. It wouldn't take forever, but it would take more time than boiling out.

This was a question set by a Physics teacher at school: "Superman has a fire to extinguish and a well 11m metres deep. He has a length of hose but he cannot suck water out of the well. Why?" The solution was demonstrated by the teacher hooking up a round-bottomed flask of water to a vacuum pump and we watched him hold it in his hand as the water boiled off.

@jan.tichavsky

2 жыл бұрын

So that's why there is water pump at the bottom of a well pushing water out instead being on surface and sucking it out?

@konstantinkh

2 жыл бұрын

@@jan.tichavsky Exactly. Submerged pump doesn't really have a limit of how high up it can push the water other than the ability of the pump to produce necessary pressure and the ability of the pipe to withstand that pressure.

@OntologicalQuandry

2 жыл бұрын

@@jan.tichavsky I think you'd have earned the Physics Master's praise if you suggested that Superman use his super breathe to blow down the well to create a higher pressure to force the water out of the hose, but, yes, that's why the pump is at the bottom. Water is incompressible so the pump is limited only by the torque and the leakage past the impeller to push the water out.

Awesome video. I'm an engineer that works with steam every day, and have never come across a video that captures so much of the fascinating nuance as this one does. Great work, earned my sub!

"Basically one giant vacuum pump." "Oops, Gravity works!

@SergioBallestrero

2 жыл бұрын

I'd love to see some FEhead try to weasel his way around this with "density", it could be a good laugh

@TimeSurfer206

2 жыл бұрын

@@SergioBallestrero Hg: "Am I a joke to you?"

@segevstormlord3713

2 жыл бұрын

@@SergioBallestrero , not a flat-earther, but I fear this would be pretty easy for the depth of thinking they're willing to descend to: "the less dense water gas escaped to the top." If asked why it had to be that tall: "There had to be room at the top."

@SergioBallestrero

2 жыл бұрын

@@segevstormlord3713 yep sure they would. But where could they say the water vapour comes from?

@segevstormlord3713

2 жыл бұрын

@@SergioBallestrero Much as I hate to be arguing in any way that sounds like I'm supporting a flat earth position - because I'm not - I don't see how this actually in any way disagrees with their model. They claim "density" is what sorts things up and down for gravitational purposes. Thus they absolutely accept that lower-pressure "stuff" is higher up than higher-pressure "stuff" when the "stuff" is the same material. The FE theory has tons of holes in it, but they don't dispute gravity is an observable phenomenon. Only that it always points "down" towards the "flat Earth" surface. Now, if there's a model that claims air doesn't get thinner (i.e. lower pressure) as you get higher, then they'd be disproven by this experiment. But I don't think the "density" model for gravity disputes that there's less air pressure the higher you go. And you can argue with them about how three stories isn't enough pressure difference to cause this by itself, but they'll just argue otherwise, and you know how hard it is to use actual math to convince them of much of anything.

4:12 Suction? I can hear my physics teacher from high school saying "Physics doesn't suck" as a response...

Excellent video. Clear, concise, with a quick pace, and a high density of information. If all of your videos are like this, you deserve more viewers. Thanks for sharing. I actually posted this to another channel thinking it was you lol. Glad I found the real channel.

As a cheap small scale alternative, you can simply use syringe. Remove needle, get 1/3rd of barrel with water, cover the hole with finger and then pull plunger for 2/3rds just before plunger pops out, and you'll see water boiling.

@05degrees

Жыл бұрын

Yeah! I was doing that as a kid. For those who want to try this at home: return the plunger back carefully, don’t just release it! Or it could go back too fast and make your finget hurt.

When you say “I just boiled a litre of water”, it’s more correct to say that you boiled a fraction of that litre of water such that it produced a litre of steam. At 0.025bar I’m unsure what the density would be since I haven’t done thermos in a while, perhaps just 0.025mg/L? In that case you boiled only 25μg, or 0.025mL of water, which could be plausible. Calculating the temperature drop due to the enthalpy of evaporation would be a straightforward task. Makes you wonder how much of the gas in there was offgassing from the plastic. I can see why the gravity-based vacuum pumps use mercury instead of water!

@AlphaPhoenixChannel

4 жыл бұрын

Yeah I phrased that poorly - you are correct - I boiled enough water so that the vapor at 0.025 bar occupied a liter. I don't want to do the arithmetic but it is much much less than a liter of liquid! oh wait metric makes this easy - yeah i think your calculation is spot on - cool!

@HenriFaust

3 жыл бұрын

A liter of steam is a liter of water though?

@MatthijsvanDuin

2 жыл бұрын

@@HenriFaust While pedantically true, it doesn't change anything about the problem with his phrasing (since the liter of steam is not the thing being boiled)

@alecgolas8396

2 жыл бұрын

@@HenriFaust but steel is heavier than feathers

@HenriFaust

2 жыл бұрын

@@alecgolas8396 Steel dust can float indefinitely while suspended by eddies in the air. This can even be a problem for so-called heavy metals, like mercury, lead, and radioactive fallout.

Additionally this is what causes there to be a limit on the height of most trees.

@ashtentheplatypus

2 жыл бұрын

*Most* trees? Are there trees that can get around this?

@koharaisevo3666

2 жыл бұрын

@@ashtentheplatypus Yes, en.wikipedia.org/wiki/List_of_tallest_trees

@randomstuff1019

2 жыл бұрын

Yup. The water/sap just has to have less pressure than a vacuum. The tallest trees have a pressure of -20 atmospheres. Of course this means tall trees always have the risk of cavitation (boiling) in their xylem should they become damaged.

@vibaj16

2 жыл бұрын

randomstuff1019 How can there be less pressure than a vacuum?

@koharaisevo3666

2 жыл бұрын

@@vibaj16 It's not, tall trees use capillary action and osmosis.

That looked like a lot of fun. I boiled water in an old dental syringe by making sure it was bubble free and filling it up about a third of the way when I was a kid. It fascinated me how I could simply plug the hole and pull back on the plunger to make it boil. This was a really cool scaled up, gravity powered version of that. It's also why water boils off so easily in the near complete vacuum of space. Nice video.🤘

@atlanticx100

Жыл бұрын

Me too as a child great fun!

@codyramos3200

11 ай бұрын

Didn't think you could pull that much vacuum with a syringe

@codyramos3200

11 ай бұрын

And I'm pretty sure gravity is not powering anything.

@kentworch

11 ай бұрын

@@codyramos3200 Not necessarily in a syringe, but gravity is what created the vacuum in the video. Gravity gives the weight to the mass of the water. If you try to suck water up a lot enough pipe, you'll eventually reach the sublimation pressure of water long before you reach a complete vacuum. Water cannot exist in a liquid state without sufficient pressure. Dihydrogen monoxide can likely exist as a superfluid as well given the right conditions.

Thank you for this! I have heard of this thought experiment so many times, but I've never seen anyone actually do it. Very cool, and so simple.

The time and energy you put into this is really inspiring. I love the video!

This is a beautiful way to teach practical physics. Wonderful way of explaining.

You can make warm water boil in a syringe by blocking the outlet hole and then pulling back on the plunger. I do it as a demonstration for my classes when I'm teaching about the effect of pressure on the boiling temperature of water and other liquids like refrigerants and bottled liquefied gases. Good video, many thanks. Toby

@Iridium43

3 жыл бұрын

NOAA tells you the altimeter setting. That is not the barometer reading.

This is fascinating! Could this method perhaps be used to distill water using only kinetic/gravitational energy? Like, set up a sufficiently tall column, feed in contaminated water, and collect the evaporation in a sort of large retort?

@robertjohnson3549

2 жыл бұрын

wanna know that also, could be a gamechanger at least for personal tap water destillation

@davidfrend

2 жыл бұрын

From what I understand boiling water kills microbes through heat, not through the vaporization of water. You're just making it really hot and the fact that it vaporizes is just a bonus. I may be wrong, but I think that's how it works.

@CreamAle

2 жыл бұрын

@@davidfrend the issue isn't even the bacteria killing properties here. It's the liquid and practicalities. There's a reason why large bodies of water are used as a potential energy battery. It takes a lot of energy to make something heavy like water go up a hill to a point where this would suffer such high efficiency losses that just some heat would be better. And why compare it to a water battery? they have to actually take this effect into consideration.

As soon as I saw the video title I knew exactly what you were doing but it was still amazing to actually watch you do it. I love physics! I'm sad I didn't find your channel sooner. Here's hoping my contributions to the algorithm bring you a few more subscribers.

This reminds me of veritasium’s how can trees be so high.

@louispalko691

2 жыл бұрын

You just got me to rewatch that video. I actually understood it a lot better now

it took me way too long to realize that you didn't just add the arrow in post

My dad used a flagpole to run this demo for a science club at my elementary school. It took binoculars to read the result. He did it on why there's a maximum height for a siphon.

I've just learn, something new, something really important, thanks

That's by far the best explanation of gravity vacuum boil that I've seen. Could you try connecting two of these together and have one boiling the water, and condensing in the other? That would effectively be water desalination system with no moving parts. I think you just need a couple of degree celsius temperature difference between the boiling and condensing bottle, which could be done by painting one bottle black. Inspiration from Robert Murray-Smith kzread.info/dash/bejne/pmqWk8-GipS2irw.html

@Richinnameonly

2 жыл бұрын

I don't think this would work, because there would need to be "empty space" for the water to recondence. And that space would necessarily have to have air in it which would make the vacuum boiling not work.

@autodidacticartisan

2 жыл бұрын

@@Richinnameonly yeah it we be difficult to generate a vacuum that goes into the condensing tank

"Ok so this is really exiting - I got a bucket of water under a stairwell with a hose sticking out of it" my brain at 4:30 am work in 2 hrs: *I'm listening*

@techmedia1360

2 жыл бұрын

it is litteraly exactly 4:30 am on the dot for me

@machina188

2 жыл бұрын

Weird that your brain stopped working for 2 hours. I hope that doesn't happen often.

I knew this. I studdied this for 4 years and i still got something out of it. And you spoke about boiling water. One of the most mondane tasks in this day and age. Hats off

bro this video straight up inspired me to a line of inquiry that lead me to learn something new. Thank you so much for your time in creating this content. It helped me.

really fantastic video but I (and judging from some other people's comments, they as well) would appreciate the conversion of all units to metric (like psi into hPa or bar)

In the future you might doing a follow up video using a syringe to boil water. Just place a partly filled syringe with a very thin needle under water and quickly withdraw plunger and you can boil water due to partial vacuum in barrel of syringe. Great video!

by the way, you're one of the very few youtubers who i care to and need to slow down video playback speed to fully appreciate every concept. most youtubers i speed up by 3x or more.

Frankly, you're the amalgamation of several interesting channels/presenters that I frequent. I will call this a big win for the KZread algorithm. Subscription achievement unlocked.

There is a great rule saying that every 10m bellow the ocean there is additional 1atm of pressure. Guided by this, one can pretty quickly realize that you just need a 10m water column to overcome atmospheric pressure(it can change by a few centimetres depending on your elevation and weather). Go metric!

Follow up experiment! How temperature dependent is it? Would adding ice cubes to the bottle and lowering the temperature of the water change the height by any significant amount?

@AlphaPhoenixChannel

2 жыл бұрын

I didn’t try but I absolutely think it would

@GordieGii

2 жыл бұрын

The density of the water (temperature) would change the height of the column that would weigh the same as the air, so yes.

I never had a good understanding of what “inches of Mercury” or “inches of water” really meant. You literally made a lightbulb go off. Great video.

My dude. You showed the good stuff at the beginning, but you know the explanation is the great stuff.

man, this would be soo much easier with metrics ;)

@mohamednabil5

4 жыл бұрын

yeaas, I'm from Egypt and I have a Mechanical Engineering degree, I spend my whole studying science and physics in metrics, and every time i watch something like this my mind just goes banana, It's like forgetting everything you knew before and no learning it again

@covodex516

3 жыл бұрын

@@mohamednabil5 Well...don't forget it^^ it's one single country which uses these weird units.

@JayPixx

3 жыл бұрын

@@covodex516 wtf? Almost every single country in Europe uses metric system ;) there are literally hundreds of countries around the world using this system. Man, NASA is using metric =D it's the system of science. I'm still waiting for the rest of the world using imperial, to catch up :p

@ronwesilen4536

3 жыл бұрын

@@JayPixx dude, he is saying that only usa uses imperial, not the other way around..

@cavemann_

3 жыл бұрын

@@covodex516 There's actually 3 or 4 more countries that use imperial. Thing is, the population numbers in less than 500 million, which is 7 billion less than people who use Metric.

I've never seen a weather report mention inches of mercury, though I have a vague memory of it being mentioned in school as part of historic science. Atmospheric pressure is reported in hPa (hectopascals) outside USA!

Love listening to people who are smarter than me. Keep up the hard work, I hope you make a good living doing this

Thank you for explaining vapor pressure so well

Ha! I was wondering why the water bottle hadn't collapsed, then the ending!

Those nalgene bottles are tough, like I've taken a shovel to them tough. I'm surprised air pressure has that much force.

@carlanwray8718

2 жыл бұрын

If it's a 10x3 inche cylinder that is almost 1500 lbs of force I believe.

@chrismanuel9768

2 жыл бұрын

Gravity is pulling the entire planet's atmosphere downward against the vacuum of space itself. Gravity is more powerful than magnetism. Gravity can pull the moon towards us from millions of miles away. It's insane the kind of pressure we can survive under as humans.

@vibaj16

2 жыл бұрын

Chris Manuel No, gravity is by far the weakest force. It’s just that Earth is huge and gravity acts on a much bigger scale than other forces. Magnetism is far stronger, which is why a tiny magnet can easily pick up a paper clip against the entire Earth’s gravity.

@brianwild4640

2 жыл бұрын

@@chrismanuel9768 but not if we had a magnet the size of earth

@gleggett3817

2 жыл бұрын

I only used to have HDPE Nalgene bottles very tough but flexible (more so with hot contents) The clear rigid plastic Oakridge pattern bottles we put in a centrifuge were stronger but you would get ominous crazing around the base after a while.

this also the reason your blood (or water) boils in space, because there is no atmosphere and no pressure.

This is a completely wonderful demonstration!

And this ladies and gentlemen is why there's no liquid water on mars, or if there is, it doesn't last long, there's basically no atmosphere on mars so that huge column of air isn't there there to stop the water from just turning into a gas and escaping out into space.

I see you made this video some time ago but I just got clued into your channel. I like it! In regard to this demonstration, could this process be used to desalinate salt water? As I understand boiling salt water, the water is separated as steam, the steam rises to a collector of sorts and is allowed to return to as water without salt. There are different ways of desalinating water but everyone says it is energy intensive. Could your demonstration be applied for desalination? Curious Tek

@laurentmaquiet5631

2 жыл бұрын

You would need to pump water up, which is indeed energy intensive

@GordieGii

2 жыл бұрын

@@laurentmaquiet5631 Actually the atmosphere will push the water up. You just need to keep the salty side warm and the distilled side cool. The production rate would depend on how fast you could move heat from the condensing side to the evaporating side. You would need to circulate new sea water into the salty side to displace the brine, but that could also be done by gravity.

Awesome demonstration, and so well explained! Your videos are amazing

Great video Brian, will definitely use it in my physics classes!

2:54 - this would be a spot where Jeremy Clarkson would say something like "sometimes my genius scares even myself"

If you catch the vapour and condense it, would that be enough to get rid of bacteria?

@Basement-Science

2 жыл бұрын

I think most bacteria can handle pressure changes like this.

@st0ox

2 жыл бұрын

@@Basement-Science I mean are they in the vapour? Normally if you boil water and catch the vapour you should be pretty save.

@chrismanuel9768

2 жыл бұрын

@@st0ox That's because the heat kills the bacteria, not the pressure change.

@st0ox

2 жыл бұрын

@@chrismanuel9768 I am not talking about killing the bacteria, I am pretty sure, that water vapour doesn't absorb most particles during boiling (therefore the boiling and catching of the vapour is recommended in most survival books and not just boiling the water, because a lot of stuff like particles and chemical elements are still in the water after boiling), but maybe bacteria are not small enough (Some viruses are of course).

@vibaj16

2 жыл бұрын

Chris Manuel No, it’s not to kill the bacteria, we’re hoping it get’s left behind when you boil the water into water vapor, like salt.

You're really smart and I love watching your videos :) Makes me feel a lil smarter each video I finish ahah

Wow this channel is blowing up! I remember you were at 30k subs just a couple of weeks ago. Well done, and keep it up!

Nice demonstration about atmospheric pressure. Question, if you lower the bottle after its empty, is it refilled again by condensation? Would you be able to get "clouds" and rain inside the bottle? Keep it up!

@AlphaPhoenixChannel

4 жыл бұрын

Because the bottle was still "open" at the bottom, when I walked all the way back down the stairs, the water vapor in the bottle would contract as the apparent atmospheric pressure went up. The amount of water vapor that boiled off was actually only ~2.5% of the volume displaced - in the intro I said I boiled a liter, but I really just boiled enough water so that the vapor, when at very low pressure, occupied a liter. If I had lowered the bottle partway (so the water line was just below the boil point "arrow", I believe condensation would have eventually brought the water level back up to the boil line, but that probably wouldn't be a very fast process. I'm not sure how the shrinking of the vapor in the bottle would play into that...

Those Freedom units should be boiling and fading away aswell, regardless of the temperature

Great job - always wondered about this, never had a clear understanding until now. Thanks

You sir are an exceptional science communicator.

You didn't boil a liter. You boiled a miniscule amount, just enough to fill the void of one liter under very low pressure.

@richhagenchicago

2 жыл бұрын

maybe he meant he boiled a liters worth of the gas phase. Technically that is still a liter of water, just in its gas phase. I am a bit surprised his plastic bottle did not collapse from the pressure difference. -- never mind, I just saw the end where it collapsed.

@Graknorke

2 жыл бұрын

Something that fills a litre is a litre lol.

@pixartist8190

2 жыл бұрын

@@Graknorke a liter of water does not make a liter of gas

@Graknorke

2 жыл бұрын

@@pixartist8190 The gas is water.

@chrismanuel9768

2 жыл бұрын

@@pixartist8190 I'm looking at a liter of water vapor. That's water.

“Im gonna go boil some eggs in water” does this but with an egg in it

@tuftyindigo

2 жыл бұрын

You'll be disappointed when your egg is still raw at the end! It's the temperature that cooks the egg, not the boiling itself. You'll have the same problem trying to brew tea on Mt Everest: the water boils at about 80℃ up there, which isn't hot enough to dissolve any of the tasty chemicals out of the tea leaves.

@pixelmace1423

2 жыл бұрын

@@tuftyindigo I mean technically its still a boiled egg.

It's not all the time, but definitely here and there while you give your explanations I hear Bill Nye in the way you talk. The cadence and inflections and all.

mind = blown. That was amazing explanations! And amazing experiment! Love to Physics !

9:13 So.. you say... "A 100% humidity doesn't actually mean that all volume is water"? And that would not allow you to breath? Have you ever been to Florida?

@saucerset12

2 жыл бұрын

Did you keep listening after that? It means the capacity of the air to hold moisture. Which is why, if you live in Florida, you can cool your house down better with a dehumidifier rather than with just AC alone.

@marshmellominiapple

2 жыл бұрын

@@saucerset12 can YOU breathe in florida?

@ieuanhunt552

2 жыл бұрын

@@saucerset12 yeah and your sweat works by having water evaporate from your skin which means if the air is at 100% humidity sweating is much less effective. Another reason a dehumidifier makes rooms feel less warm.

@saucerset12

2 жыл бұрын

@@marshmellominiapple You're saying I can't?

@JavierAlbinarrate

2 жыл бұрын

LOL There's always someone for whom jokes, sarcasm, etc just fly above his head. Cheers for them, as they make the world even more laughable.

You didn't boil one liter of water, you only boiled so much to get one liter of vapor ;)

@brianwild4640

2 жыл бұрын

he boiled 1ml as vapor is 1000 times the liquid lol

@neonnerd1364

2 жыл бұрын

I just want a liter of cola.

@Wordavee1

2 жыл бұрын

It's not vapour, it's steam, there is a difference.

@brianwild4640

2 жыл бұрын

@@Wordavee1 steam is a type of vapour maybe we should have used the word water vapour but seeing as we was all talking about water it was not really needed

@Wordavee1

2 жыл бұрын

@@brianwild4640 I don't want to be too pedantic, because I thought it was an excellent experiment, but what was in the bottle is a gas. I remember from school, and reinforce in my engineering courses, when a kettle is boiling, the couple of centimetres of invisible gas coming out of the spout is steam, and when it becomes in contact with the colder air it condenses, of course everyone calls it steam, but the teacher correctly says, it not steam, it is water vapour, steam which has changed its state from a gas to particles of water in the air. As the bottle had no air in it, and the water boiled, then what is in the bottle is the gas formed when water changes its state, called steam.

man your intro is absolutely sick. its great every time.

pretty frikkin amazing!! you just don't realize how much there is to learn ...WOW

@AlphaPhoenixChannel

3 жыл бұрын

One of the professors I worked for in undergrad said that "Universities are places where knowledge accumulates." because grad students come in knowing everything and leave knowing nothing, and total knowledge has to be conserved.

Was it just me or was the green arrow yellow?

@orti1283

2 жыл бұрын

It seems like lime green, then color gradingay have messed it up

11:39 “it’s brand new i bought it today” Lol universe doesn’t care

@kindlin

2 жыл бұрын

If I were to put thought and effort into the design of a water bottle, one of the obvious design parameters of choice would be to withstand negative atmospheric pressure. It can't feel more than that without a contrived setup, and normally won't even feel that pressure ever. If you take those water bottles, probably 50% of them implode at a vacuum.

@shrimpflea

2 жыл бұрын

I think he was pointing out that it wasn't an old bottle that might have been weakened so more easily crushed.

This is a great video with clear explanation.

been wanting to do that for years , top vid , deffo got to do it now , awesome

Great video, but really wish people would just use the metric system.

Great video ❤ I'm gonna say it... the explanation & maths is a hall of a lot easier in metric... you don't need to convert units 3 times... We don't even use inches of mercury, just Pa.

@WeighedWilson

2 жыл бұрын

mm of mercury is how blood pressure is measured

Great vapor pressure visualization and explanation.

I’m glad Steve Mould sent me to this channel. Great video!

Metric when doing calculations, especially with water, is so much easier than any other system. Really interesting video, always wanted to try this myself, but doing the calculation in pounds, inches, and mmHg is just mind numbingly confusing and unintuitive.

I love your videos, they are both interesting and meaningful. However it's a shame that you, as a scientist, don't use the SI-system.

This seems to give a hope that there could be some extremely useful things to create with this technology.

We had a lab in high school where we did something similar, boiling water under a vacuum. The teacher set it up so we wouldnt expect the result. It was fun and clearly memorable.

the whole boiling water at room tamperature thing gets more kinky, with a small amount in an insulating container. the rapid evaporation extracts a heat from it, untill the water freezes solid while still bubbling.

8:47 fun note: Even as a solid, there is still some water "evaporating" from ice in the freezer. It's the whole process behind "freeze drying" CodysLab did a video about it: kzread.info/dash/bejne/e5l5msiqn5rZYaw.html

That is insane yet so simple

That experiment earned my puny little sub. Looking forward to more. Thank you!

REI= really expensive items, buy elsewhere like campmor and save a bundle

@ianh1504

2 жыл бұрын

i remember reading a book about the founder of rei, and he wrote about one day a hobo walked up with 1.25 and tried to buy a can of stove fuel to get hammered on, but he rose the price to 1.50 so the hobo couldnt buy it, and he walked out just completely broken. and i think that was the beginning of rei guy's love affair with price gouging and ensuring homeless people dont have any access to camping equipment.

How is it "room" temperature when you are outside? Check mate atheists!

@vibaj16

2 жыл бұрын

Because there’s a lot of *room* to set up the experiment outside

@barendleroux6618

2 жыл бұрын

🤣🤣🤣

@brianwild4640

2 жыл бұрын

@@barendleroux6618 Colloquially, room temperature is the range of air temperatures that most people prefer for indoor settings, which feel comfortable when wearing typical indoor clothing. lol I know it was a joke

@vibaj16

2 жыл бұрын

Brian wild I think you replied to the wrong person

@hairymcnipples

2 жыл бұрын

That room? Albert Einstein.

For more content like this allover the globe. Interesting physics, explained in a usual situation and teaching a plenty of stuff while. What i mean is: good quality work

Thanks for this lesson, it has lessened my stupidity.

It's always so weird when someone tries to do something technical in imperial 😝

@AlphaPhoenixChannel

3 жыл бұрын

yeah....

I think we need a new definition of the word "boil", because boiling to most people means "hot", which it doesn't, obviously.

@vibaj16

2 жыл бұрын

Boil means liquid rapidly turning into gas, often having bubbles form under the surface.

This channel is so under appreciated

@AlphaPhoenixChannel

3 жыл бұрын

thanks!

Very good video, very well explained. Thanks.

Easily one of the best youtube channels

Great video, love all the details really good!

@AlphaPhoenixChannel

3 жыл бұрын

Glad you liked it!

Chemical engineer here commenting on the last min when he collapses the water bottle: this is something we constantly have to be aware of in manufacturing plants with metal tanks. They're designed to withstand alot of force pushing out from the inside but if you were to create a vacuum in the tank its pretty easy to collapse even a stainless steel tank because they're not designed to withstand that force

@delfaulkner1299

Жыл бұрын

I'm wondering how they could design a metal square container to withstand that negative pressure...maybe sturdier welds?

So will this type of boiling affect proteins? Will it denature any proteins within the water like regular boiling will and make it safe for consumption? Cool vid.

It feels to me like this is a sort of demo that would be great for science classes. My high school had some stairwells tall enough for this experiment.

This video cleared a surprising amount of minor misunderstandings that I didn't even know I had. :)

you are a great teacher

Great example. But don’t forget, it still takes energy to change the liquid to vapor so the warmer it is outside, the faster it will boil. Also, many don’t realize that water won’t go over its boiling temperature, adding extra heat makes it boil faster but NOT get hotter. Excellent video.