That has to be the most British science experiment ever.

@DurgaswaroopPerla

2 жыл бұрын

Why?

@snikrepak

2 жыл бұрын

@@DurgaswaroopPerla I believe the word Tea, has to do with it, op is either an American, or a funny Brit.

@sajithchamara6885

Жыл бұрын

And the accent 🤗

@inexp1

3 ай бұрын

'Just a tasta' 😂😂

...these comments already. These vids are meant for younger generations still learning. The cringe acting is an age-old way of teaching enthusiasm for learning something new because holy shit, there are still young people in this world who don't know everything yet. Think back to those ubercringe VHS tapes you watched at school and actually learned from. Same thing but now online.

@handsomebear.

7 жыл бұрын

Well, they were cringy as hell even when you were young. If they weren't so cringy maybe more people whould've payed attention. (:

@TheBluMeeny

7 жыл бұрын

I didn't think the acting was cringey?

@TheBluMeeny

7 жыл бұрын

Johnny Kronaz I put the question mark there to signify the quizzical tone of the sentence. It usually doesn't help your point if you're going to throw in insults in with your conversation point. It makes you look immature and off putting, so I'd avoid it if I were you, especially over a punctuational style comment.

@JohnnyKronaz

7 жыл бұрын

That's usually the argument of a pathetic child who can't admit when they're wrong. Question marks go at the end of actual questions, they're not for decoration. If you're not sure of your opinion, don't ask me.

@TheBluMeeny

7 жыл бұрын

Johnny Kronaz That's a matter of artistic style though. You aren't a very nice person are you then? I don't like dealing with people who refuse to give others, and myself included basic civility. Especially over something so inane.

These guys must have skipped high school chemistry

@Puppy_Puppington

3 жыл бұрын

What is Islam? God also said: “ you know what’s cool guys?!?! SLAVERY! BEATING WOMEN & PUNISHING THEM & giving them less rights! & the holocaust! & children getting + dying from cancer! & rape! & innocent people getting killed by martyrs & little kids getting molested! GENOCIDE! & EVEN better... MUTILATION OF CHILDReNS & InFANTS GENITALS!!! Killing homosexuals! Negatively Judging others/ condemning them instead of being open minded!” Hey let’s all follow this book! It’s gods will!!! Not like humans wrote the actual book!!! Wake up, you ignorant idiots. Man made god. Not the other way around... if there is a creator that has “rules & morality”, then it has a lot to fucking answer for... you know how hypocritical you guys are?!? Do you think it’s coincidence that where religion is HUGE it’s the most primal & violent?!?? Just look at the Middle East! How advanced are their societies?!? How well are they doing as an overall people huh?!? Major religions have slowed down humanity’s progress so much. I’m glad that it’s slowly dying out. You don’t need a false invisible deity lord to watch your every move to have morals... you can be an intelligent & respectful & loving kind person without having to fear repercussions of an asshole god... I prefer someone be kind from the bottom of their heart or mutual respect than they only do it because they were forced a crazy radical idea when they were kids that’s equivalent to having a gun stuck to your head... aka going to hell... it’s just ridiculous. Look at the radical religious terrorists & evil violent folk... they think just like you and are as close minded as you... open your mind. Advance. Grow. Move on. Or be just like them... stuck in a little bubble without compromise. The least you can do is not force young minds into this BS. Let them choose when they are intelligent and wise enough to decide for themselves... it should be illegal to instill these religious mindsets on kids... it seriously can traumatize a kid... especially after you mutilate their genitals & they live their lives thinking it’s wrong to be horny & they’re gonna go to hell because they got aroused or touched themselves. So fucked up. Radical crazY type of Religions have got to goooooo.

@Pheminon1

3 жыл бұрын

Bruh I have been out of highschool for 6 years and I completely forgot about this.

@thelatenightgamer2624

2 жыл бұрын

@@Puppy_Puppington I know for a fact your a ex Christian who is exactly 14 years old and lives in America

@Puppy_Puppington

2 жыл бұрын

@@thelatenightgamer2624 yeah. Wanna double down on that bet and add me on social media or directly video call me & tell me that with your shitty grammar. Or hell... I don’t mind meeting up in person. What’s up? When can you meet to confirm your theory.

@nwaary97

Жыл бұрын

@@thelatenightgamer2624 and what am i ? 😂

One of my favorite physics demonstrations is using a shallow dish of water inside a bell jar, so that you can boil the water until it freezes. Boiling is a cooling process, because it removes the fastest moving molecules first, lowering the average temperature of the water.

@tophat2002

Жыл бұрын

Does any heat rise upward to the top of the jar?

I see a bit of confusion in the comments, so let me throw some basic theory behind it. Some comments point out that PV=nRT might be useful to visualize what happens, but the formula is true only for ideal gases so it is not clear why it should apply to water and (even less) to the transition. The truth is more that the phase diagram of H2O has three phases (gas liquid and solid) in the Pressure-Temperature (P-T) plane and the lines separating these phases are not parallel to either the P or T axes for constant volume (V). Lines of constant P or T intersect the transition and different T or P respectively. In other words, by changing P or T I can cross the transition line at different T or P (in the video at P=0.75Atm we see the transition crosses at T=83C). The crossing of the transition line requires energy and H2O can stay in either phases as long as this energy cost is not fully spent. This phase coexistence is what we call "boiling." The guy was confused at the end because in normal life an exchange of T is more or less equivalent to an exchange of Energy. As a matter of fact the example at the end had in fact P=0 and T=ambient temperature, but energy was indeed exchanged between ambient and H2O molecules. It just so happens that the T of the transition was the ambient one so the bottle was "touchable."

the man in the blue shirt turned into a meme in the last forty seconds

Hold the bloody camera still

I was just debating my mom about this... had to prove her wrong LOL

That camerawork... omg... really?

Did they drop out from the 6th year of school?

what's with the extreme close ups. holy shit I don't want to see their nose hairs.

@ButtKraken01

7 жыл бұрын

why not?

@CsharpPreza

7 жыл бұрын

I would agree if she weren't pretty.

@avillp

7 жыл бұрын

+Filip Kopecký I would agree if you weren't able to land a plane in between her eyes.

That vacuum was huge. It wanted to suck the camera out of this universe.

@realfantasyauder9489

3 жыл бұрын

I’m sad this nice joke is lost here... someone take it yo another science video.

lol. I love this. She just told the guy she is going to boil water without heating it and he says “well because you can’t” Dude, she JUST told you she is going to do it. Did you think she was joking? Lol

@shitpoststatus7508

Жыл бұрын

But she didn't

@ontariobuds

Жыл бұрын

@@shitpoststatus7508 she totally did. I didn't think I would have to type out what happened but she changed the water from a liquid to a gas without adding heat. She made it boil without adding heat.

lol love how his take on this interesting fact is "that's HUGE news!"

the camera is really really clear

"Hey how do you think we should retain viewer attention?" "Cut to a different shot every 1/10 of a second." "Brilliant!"

Bring back james may

Cringey acting.. really cringey.

as a science presenter how many times can you not know about something and still present it?

@edss

7 жыл бұрын

Hi Greg! I do love your other videos don't get me wrong, they're definitely educating and entertaining to watch. How do I find out more of your programmes on BBC? I'm here in the UK but I don't think I've ever seen you on air?

Oh god, please keep the cameras stationary

1:20 "Now im going to blow...." Me thinking wait for it......... oh nvm

This is why, with a high-pressure pan, you can cook food faster. Because due to the positive pressure the liquids heat up far above 100 degrees before they start boiling. And higher temperatures means that the food is cooked faster.

I wish the camera would stay still. The constant movement makes my head hurt.

For a split second that guy looked ready to burn a witch lol

Can you please list the equipment you used to recreate the experiment in a classroom for children?

How did you set the experiment, can you please list all the components

Thanks for clearing the concept map

Im in high school and I feel superior to these fellas now 😛😂😂

@Puppy_Puppington

3 жыл бұрын

You are buddy!! Keep that education going. It’s straight power!!!

What about sublimation (a solid turning directly to a gas without being liquid in between)? That would be cool to see!

@Yoginiengineer

3 жыл бұрын

Naphthalene balls are the best example, you can do that at you home yourself.

they need to go back to highschool , that excitement lol

The opposite is, indeed, the way a pressure cooker works: by raising the pressure, the boiling temperature will raise together, so you can cook into water which is not vapour at more than 100C/212F ;)

It would have been even cooler if you'd shown how the water in the flask actually cools down. I've once managed to cool down a mixture of ether and water (and maybe ethanol too) so much that some froze, just from pulling a vacuum.

I wonder if you can make beer like this...

I wonder if how difficult it would be to make a tumble dryer that uses this principle, i.e. draws a vacuum to boil the moisture off clothes, assuming this would be more energy efficient than current dryers.

Which *Colligative Property* does it shows in this video ?

That's how you make ice tea. Never mind.

Huge news

The camera operator seems to have had a few too many beers before shooting.

To the Hyperbaric Chamber, That Hyper strength Lapsang souchong won't brew itself.

the best video that I got goosebumps when I completely understood it

Dom is definitely made for the radio....

As a cryo engineer.. all I'm thinking is.. that water vapour is soooo bad for the compressor pump. :'(

@herrmayhem1915

7 жыл бұрын

Haha! I was hoping that the flask wasn't going to implode.

@heoTheo

7 жыл бұрын

I think the rubber would be sucked into the bottle before that happens :P

@heoTheo

7 жыл бұрын

short answer is yes. These compressors often can be bought with inlet filters for vapour (vapour traps). Better answer is use a Venturi Vacuum Pump to get most of the vapour out of your system. Then go to the conventional pump, then to the turbo pump. Still might need an oil change now and then.

Things boil at different temperatures. Look at liquid nitrogen, it's boiling, and it's freezing cold. The Dom guy on this can't be that thick surely? Also, the camera, again, all over the place, really annoying.

@DrDeathAribertHeimHk47

7 жыл бұрын

or its just staged reaction.

@Quintinohthree

7 жыл бұрын

It's quite remarkable to see something start boiling at the same temperature as at which you had already seen it be liquid. Sure nitrogen boils at rediculously low temperatures, but what about that suggests that water could boil at room temperature? It's a different substance and so it has a different boiling point, it makes total sense.

@philno

7 жыл бұрын

vapour pressure point

@TheFounderUtopia

7 жыл бұрын

Quintin, the guy literally said that things have to be really hot to be boiling. Your whole response to Andrew is based entirely on you not paying any attention to the video.

@Quintinohthree

7 жыл бұрын

But explaining that different substances boil at different temperatures doesn't explain how the same substance can boil at different temperatures. That is what the video explained. Your whole response to me is based entirely on you not paying any attention to the video and how it differs from Andrew's response.

This is INSANELY cool. I love videos like this.

I am great fan of this program

I don't believe that bald didnt know about this unless he is a very mature looking 4th grader.

can we use this method of low pressure boiling to clean water ?

isn't that called the armstrong line ? the pressure (in our atmoshere) at which water spontaniously starts to boil

Which *Colligative Property* does it corresponding to ?

Should've mentioned the liquid will get colder as the more energetic molecules leave as vapour

OMG, you are the first British person who use the proper Celsius and not Centigrade. Awesome!

That guy is the best actor ever, because I would not have been able to keep a straight face saying stuff like that XD To be fair, it is interesting to see water boiling at room temparature, but if you know the first thing about how boiling works, then you know it's tied to both temparature AND pressure. Of course the kind of people watching this on TV probably aren't the kind of people who would know that though.

When it rains you got the same thing but in reverse.

this is what confirms normal room temp in space

When boil water it losses heat because he higher energy molecule evaporates leaving lower energy molecules that cause to temperature loss (or heat loss)

That rather interesting phenomenon is called Cavitation and mechanical engineers most of the time find it quite unfavorable

Question. If you boil water by taking out the air does the temperature of the water go down? I suggest it will do so. This is where the energy comes from to turn liquid into gas.

It is Superb.........!

You mean partial not full vacuum right? That's a pretty important distinction xD

Technically, heat is involved. If she measured the temperature of the water before the vacuum pump was started, and observed the thermometer while the "room temperature" water boiled, you'd see the temperature of the water drop. Even though the water boils at room temperature, under a certain level of vacuum, heat is still required to change the liquid molecules into a vapor.

Will the temperature reduces ?? Like the condenser ??

teacher: give me examples of solid? student: water@0degrees celcius. teacher:?

That was so sweet

this explains the difference between heat (kinetic energy) and temperature! omg i finally get it. so does this means solute like tea would still dissolves as easily in non-heated boiling water as it would in heated boiling water? so does this mean a cup of tea brought from earth surface to outer space would start boiling? why or why not?

@TheRealMrMagic

4 жыл бұрын

Both very good questions. If tea from the surface went to the Moon inside the rocket with the astronauts it would not boil because the cabin is pressurized. If the Tea was riding on the outside of the rocket somehow and could survive the launch into space, the liquid would sublimate and drift off as soon as they made it into space.

@davidvickers8425

2 жыл бұрын

Probably a good reason they wore pressurised suits or their bodies would boil

Can i use this methad in my essential oil plant to boil water..❓ Anobody Plz reply

If someone made a way to trap a stream of water (e.g. faucet, garden hose, etc.) from a standard atmospheric pressure outside source into a vacuum where it immediately boils at room temp, this would be a tremendously great invention for plumbing. It would hafta be immediate, though as the device would hafta stay at constant volume (even though it has a constant flow increasing it). Could this be done chemically where all input chemicals are inert & the end results inert?

Can we use this method to filter clean drinking water from sea water? Or drying clothes? How much energy we can save compare with conventional way?

Yes, so think people! It is posible to take a huge old boiler train engine, hook it up to an electric generator and run it at room temperature merely by placing the hole unit in a vacume chamber. And you don’t have to burn cole or wood or gas or anything.

well, it also has to do with temperature. Nothing will ever boil at -273C. But yes, lower pressure = lower boiling point

I approve this tea. BRITS ALWAYS APPROVE TEA!

Yeah... Argue with the scientist. That makes you look reeeeeally smart.

Returns to water at normal pressure. No loss of volume

who noticed that the vapor pressure was lower than usual? Must have been a bit warm in there, or residual heat from earlier. At room temp, ~20C, water turns to vapor at a pressure of 2.3392 kPa. Not much of a difference. You also have to take in account the specific volume.

What would happen to ice cubes instead of water?

0:53 I wish she had explained how "that's why tea tastes rubbish on a plane." Is it due to the mechanism by which tea steeps? Is it that the cooler temperature at time of consumption makes the flavor less apparent to the drinker?

You ever try boiling beans at 10,000 ft? Hope you have a couple days!

Is there any other fluid which boils ata room temperature like water??

Is room temperature in UK the same as room temperature i the sahara desert? Just asking for my friend. 😊

How does greg not know this, I even knew?

what is this?! are they gonna build a volcano with baking soda next?

actually boiling has something to do with temperature. However, it's not temperature alone that affects boiling but temperature and pressure actually. see at very low pressures water will boil at room temp. But if you cool it down at that same pressure it'll stop boiling and you'll have to reduce the pressure even more to get it to boil again. to put it neatly the pressure water boils at some specific temperature is called the vapor pressure.

My question. If the astronauts on ISS drop a bowl of water out of the window, Is this will turn to vapor in space instantly??

What are we looking at 12 years old kids , OMG

Pressurised to 75%. What are you going on about? Try pressurised to 8000 feet.

now i get why people with British accent sound intelligent

This is an answer to the question of how to record a video in the worst possible way that all the viewers get annoyed to the stomach.

in fact you actually cool the water that way too.

Now they must rewrite all food recipes: Put egg in boiling water for 10 min (DO NOT USE VACUUM PUMP TO BOIL WATER.) HAHAH

When saturated vapour pressure becomes equal to the pressure of the system, that is when boiling starts.

Now my question is Does that mean it's easier to split water into hydrogen and oxygen in a vacuum?

@robertwaffel8248

7 жыл бұрын

No. It does not.

@MinecraftTarantulas

7 жыл бұрын

No, because this is a physical (state) change and splitting water into hydrogen and oxygen is a chemical reaction

@nathantron

7 жыл бұрын

Yeah but does it cause the chemical reaction to happen easier or harder. I'm interested in the science!! Haha

@MinecraftTarantulas

7 жыл бұрын

***** Oh okay, I don't know

does the water boiled by vaccum is safe to drink

the phase diagram is tilted and so that the phase transition line is not oriented with either P or T, come on guys

But can anyone explain ...even if we add ideal non volatile solute (at atm. Pressure) ...we know it doesn't change any molecular bonds between solvent....so why does it take more energy now to boil it??

every neet aspirant should know this phenomena

shake it camera guy, shake it ...

So when introduce small amount water when piston vacuum and ignite then we had combustion without fuel other than water constituents of hydrogen and oxygen and warm air

Can you turn coId water in to room temperature water by doing this?

Looks like you used the wrong type of tubing. You need thick walled tubing that can withstand the vacuum.

But now I am sitting here wondering how good would the tea be, made in the water boiled via vacuum ??

@KorboQ

7 жыл бұрын

I don't see what difference it would make. Water doesn't change composition when you boil it.

@TWiGsADV707

7 жыл бұрын

But the tea making materials would not be getting hot.. or as hot.. like when seeped in boiling water. I suspect that the heat helps to release the essential oils on the tea's herbs, not just the action of water boiling.

@KuraIthys

7 жыл бұрын

My guess is the act of boiling has nothing whatsoever to do with making tea, just the temperature matters. Boiling is just commonly being substituted for actually checking the temperature. So... What does tea taste like when made in a vacuum? Get water, let it reach room temperature. Try to make tea with that water. - Question answered. (this also means if you have a suitable thermometer, and a chart of boiling temperatures vs altitude, you can replicate the effecrs of airplane tea making. -most aircraft have a cabin altitude of about 8000 feet while in flight)

@TWiGsADV707

7 жыл бұрын

I would have made the same guess too... but these guys presented the question.. just never actually answered it in the video. :)

@KuraIthys

7 жыл бұрын

TWiGs ADV - Keep Off The Pavement Yes, they were a bit slack about it. XD

Imagen the the made out of boiling water under 100 bars os pressure 😂