Boil Water at Room Temperature! - Hydrostatics

Engineers that work with fluids need a solid understanding of how they behave, and there’s one branch of fluid mechanics that plays a role in areas all across our lives. Whether you’re designing a water tower for a city or you just want to understand how those upside-down pet bowls work, you’ve got to know how to relate the depth and pressure of a fluid: hydrostatics. Thanks for watching!

Music: Soft and Light - Electronic Senses

[AdilRas]

I love this channel because he leaves nothing hypothetical. He builds and demonstrates everything and leaves us amazed. He works really hard on his videos

[tiemen]

My high school physics teacher put a vacuum pump on the 5th floor ran a hose all the way down. Our school was just high enough for him to do this demonstration, and he take the effort to set everything up. I remember I was quite amazed and puzzled and starting asking all kinds of questions at the time. It really is the best way to learn about non-intuitive topics and this channel is doing a great job at it for everyone with a lower school roof.

[dmitriykozmin]

"what if we could build a taller cat bowl?" me: "I'm listening"

[ErnestJay]

This is the reason why i'm subscribing this channel, simple explanation, easy to understand, and SCIENTIFICALLY ACCURATE.

[PracticalEngineeringChannel]

Holy moly, where'd all you people come from?! Thanks for subscribing!

[brewertonpaul]

I'm now hooked on your videos, making engineering so interesting and easy to understand. As an electrician my working life focus has always been on electricity but I am now fascinated with all the other disciplines and have a new found thirst for learning. Thanks for all the effort you are putting in making these great videos!

[theevermind]

Haha, "engineers who work with fluids need a solid understanding"

[jathalan]

Great video! One thing worth mentioning is that trees manage to break this rule. Redwoods are far taller than your PVC pipe, but have Xylem (small tubes to transport water) running from the roots to the canopy. Only two things prevent the water from boiling ; a. the small diameter of the tube actually inhibits the state change and b. the perfectly smooth walls of the tubes do not have any imperfections to serve as a catalyst point or any defects to initiate a boil. The xylem can draw water using capillary action, and be absorbed at the top with no boiling.

[logx]

the part with the boiling at the end was really interesting, too bad it was so short. I wish you could describe it in more depth :-/

[karelbroda]

I think that you do a great job explaining engineering to the “earthlings”, and doing a great service to the engineering profession. By the way, you do more for us, professional engineers, than all the “professional societies” combined. I enjoy seeing your dog in the video!

[TheMatissV]

--- DO NOT USE A LADDER LIKE THAT ---

Use an extension ladder that goes ~3' above where it touches the roof. Have the angle at ~4:1 (1 unit of length horizontal for 4 units vertical - if you're going on a 12' ladder against a wall, the bottom of the ladder should be about 3' away from wall).


Make sure the bottom of the ladder legs are level and on a secure footing and on a non-slippery surface (wet wood = surprisingly slippery). Make sure the both legs are touching the roof with an even amount of pressure.

If you only have a step ladder, make sure it goes past where it touches the roof, and made sure you tie the step ladder's legs together so it doesn't open accidentally.


More safety: have 3 points of contact at all times when climbing a ladder, and only put your hands on rungs (not the legs) when using a ladder.


It's easy to get lazy on ladder safety, but its just as easy to seriously mess yourself up on one.

[WarpedYT]

I love your channel !!. you need like 100 million subscribers so you can help educate our new generations. very well presented.

[goatman]

I frequently boiled water at room temperature while in the refrigeration business; pulling a vacuum on the system before charging with refrigerant. Very interesting videos, you have another subscriber.
(I'm Jay, Robert's cousin)

[Perius]

This is proof that even science benefits from a well placed pair of googly eyes.

[coachhannah]

Had a physics professor demo water boiling and freezing simultaneously. Cool demo!

[Azivegu]

I have a problem here. I want to give you a like for using SI units, your dog, and the fact that it was a good video, but can only give one. Which on would you like?

[albanveshti]

One of the best channels on youtube hands down

[maanvis]

I'm glad that you explained what those feet were in meters otherwise this vid wouldn't have made much sense for me :)

[Cole.Varial]

4:13 I thought I was entering an alternate dimension into a horror movie

[stefanradovich]

Very thoroughly explained well done. It's tricky to have a specific target audience on youtube as people's prior knowledge varies so greatly. After looking through the comments i think there's two main things people are still missing. 1) The lower container being sealing is absolutely critical in the model 2) There's no such thing as suction or negative pressure. When i try and explain similar ideas to people about pressure i pump up a bike inner tube to 101kPa (14Psi) and get them to squeeze it, then try and explain how the air around you is actually squeezing you that hard all the time but we're just used to it. I think your average viewer doesn't understand gauge vs absolute pressure.
Your videos are of much higher quality than a lot of the stuff used at universities. I reckon you've got the potential to go niche and even sell content to universities with more specific videos. My university was really struggling to teach heat pumps, a video like this about isentropic efficiency, mollier diagrams and carnot cycles could go a long way. There's videos out there already but they're very much just voice over written notes.