Interesting vacuum chamber
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- čas přidán 22. 06. 2013
- Handicraft construction of a vacuum bell, various experiments. With the bottles, the vacuum pump is removing the air inside, creating a pressure difference inside the bottle and the surrounding. When the pressure difference is stronger than the plastic, the surrounding air pressure collapses the bottles. The surrounding air has a pressure equal to 1 atm, or 14.7 pounds per square inch, which is pushing against everything. When the air is sucked out of the bottle, even a small drop to say 10 pounds per square inch, there's a difference or a force of 4.7 pounds per square inch pushing against the bottle. This is a strong force. After that he simply reverses it, increasing the pressure inside the bottle and inflating it again. As you can see when he puts the deflated bottle (with a lower pressure inside), in the vacuum "chamber", the pressure of the surroundings are equalized to the pressure inside the bottle. When the pressure difference is equal, the plastic will bend back to normal. When the water is placed inside the vacuum chamber, and the pressure of the surroundings are reduced, the water actually boils, yes, it reaches boiling. But it's important to realize that the water do not get hot (it actually gets slightly colder). The only reason why water stays a liquid to begin with is because the air is pushing it with a strong force, forcing the water molecules to stay together. Boiling is actually defined as when the vapor pressure is equal to the surrounding pressure, the vapor pressure being force exerted by liquid "wanting to become a gas", or how readily it can vaporize. At lower pressures water boils at lower temperatures. With the polystyrene balls, there's a fan inside the chamber which is blowing them around. As the air is removed, there's no longer any air for the fan to move around, and no air exerting their force on the balls, so nothing happens there. With the bell in the chamber, you have to realize that sound is carried as pressure changes in air. So sound necessitates air to move. When the air is removed, no sound can travel, so you won't hear anything.
With the filament bulb. Most pure metals will react with oxygen in the air, forming metal oxides, one example being rust (iron oxide). The reactivity of a metal to oxygen increases as the temperature increases. A red hot glowing thin metal wire would react with air instantly, and "burn out" or oxidize. This is why filaments are covered by a sealed glass bulb, which are not actually at any reduced pressure, but simply filled with an inert gas (and the oxygen removed), that will not react with the metal. The vacuum removes a lot of the oxygen, reducing the rate at which is oxidation can occur, and the bulb don't burn out immediately. * Compressor model: LG Electronics Inc. NK 164 PAB - LRA20 - 1PH 50Hz 220-240V - Věda a technologie
Impressed how quite it is
This must be the first video on CZcams I ever watched without stopping or pausing or rewinding or fast forwarding. This is what I consider a well made video.
Aleksandar Grozdanoski bro Same
You shoud see my experiment on my channel. It shows that adding CO2 to a lighting filament makes the filament dimmer, not warmer, hence refuting the supposed back radiant heat inducing effect of CO2. Radiation Greenhouse Effect is a lie.
Thank you! A great vid! As a refrigeration mechanic vacuum is a part of our day to day work. I'd love to see an ammeter fitted to the axial fan though, to see the effects of a frictionless environment on motor load. I'm guessing amp draw would fall....
anche se si tratta di principi fisici conosciuti , vederli applicati in questo esperimento e' sorprendente, veramente bello
Awesome !!
So what your saying here (without so many words) is that resistance to wave propogation in any medium is proportional to inches of vacuum drawn...nice. The styrene was great way to demonstrate particle excitation upon repressurization. Subscribed.
My eighth grade science teacher used a pump and table like this with a glass cloche to do demonstrations. The most memorable was his first demo with it. He claimed it was a fancy hot plate and bet the class he could drink boiling water. He won that bet. He then proceeded to do a lot of the demos here. Cool stuff.
I think it would be interesting if one could put a metal plate beside a glowing filament under vacuum. I believe it would make low energy x rays. A section of unexposed b and w film could be placed in a metal container next to the experiment to study the pattern, or maybe some photo paper in an envelope. I think I've even seen some video camera sensors picking up x rays too. I wouldn't want to do that for very long, though.
Melhor vídeo de vácuo do CZcams que já visualizei até agora, muito bom parabéns, Very good
Thanks for the great video.
It's a great idea. Really I want to make this type of project. thanks for your nice idea. I will try to make according to your idea
Ótimas experiencias, o som não viaja no vácuo mas a luz se propaga com mais intensidade no vácuo.
AWESOME vacuum set up!
sweet setup using a rotary compressor!!
Excellent set of experiments. It would have been interesting to see vacuum gauge readings at various phases, for example, when the water 'boiled'. I'm planning to build a vacuum pump for vacuum bagging and low pressure distillation - the air-con compressor you show looks ideal for this.
Very nice demonstrations and the filming is great unlike most videos done by weird people incapable of setting the camera straight.
You're the best man !!!! :D
Make some experiments with the compressor + freon please!
When you saw the water look like it was boiling it was actually at room temperature when it was percolating. I sell equipment that uses that technique to chefs and its called Sous vide cooking, its French for "under vacuum". It opens the fibers of meat to allow the insertion of spices without the heat from temperature causing the meat to change structure. Cream sauces will not curdle using this process.
But will it kill the germs? I wouldn't trust it. Unless you also irradiate said meat with Cobalt 60.
@@zwz.zdenek vacuum is only the first step. Second step is bringing the sealed sous vide bag up to safe temp or otherwise cooking the contents. If you often eat in restaurants, even fast food, I will bet you $1000 you've eaten much food processed by sous vide.
Amazing... Thanks for the knowledge update...
I really enjoyed the sound of that school bell being snuffed out, it just felt right!
"In space, no one can hear you at the door". That was one of the best videos I have seen on here. Fantastic job.
Ed Sipes
That was was one hell of a good video, Wobert;) Thank you!
Put ice in a vacuum insulated on the bottom, and the same ice outside insulated on the bottom, time it how long it takes to melt.
The ice in a vacuum should take longer to melt, with less energy transfer from the vacuum
So many experiments are performed in this one video, it is helpful for my explanations with my children. An interesting video ever I have seen on you tube.
You taught me something today. Two semesters of college physics helped me explain what I was seeing. Kinda cool!
parabéns. vídeo espetácular!
Great fun to watch. Thanks for posting.
Awesome Video!!!
The boiling water demo is so old, it is almost cliché but,
I never saw the demo with the Styrofoam balls before.
Amazing!
you know how to do the water
Thank you very useful experiments
7:55 now i know where to put my alarm clock
or no alarm clock at all?
Why no one taught us like this in science class?
shity government standards.
You never learned about pressure and volume in chemistry? What state do you live in?
+Vevo Squeak He meant that they taught with crappy vacuum chambers or no vacuum chambers. We had one in my chemistry class but not as cool as this one.
There are lot of things government doesn't want us to learn we taught what they want us to be not what we want to be. Our mind is capable of limitless calculation but in our school we are program to think and act in a way they want us to be, to function their meaningless system, a form of control but that is my goal right now I want to teach deserving youth what life is all about. If you have religion better stay away from it, there is so much bullshit on it.
My eighth grade science teacher used a pump, table and cloche, very much like this one. He was also one of the coolest teachers ever. Early 90's in Indiana.
This video proves that vacuums suck and are not nothing as nothing cant do anything to objects within it!! Thanks!!
Good video Sir
I repurposed a dehumidifier compressor for a vacuum pump (not as big as your A/C unit on the video). I've used it for bleeding automotive brake lines that were difficult to either gravity feed or hand vacuum pump. It performed nicely.
Really good!! I will use this clip in my classroom, it gives a good understanding about what air is and how things work without it. Especially the polystyrene balls and the bell!
Excellent video, many thx, that is how they must teach the young uns, not boring them to death.
Can you tell if it's possible to do a plasma globe with only vacuum, and if it works well? (Sorry for translation errors if there is, I'm from Brazil)
yes but it would be very dangerous as it could implode sending glass shards flying, and it would make xrays too
Brilliant Demonstration....
You're awesome Guy! I want to build a vacuum pump with that type of compressor and I think that I have found the right guy!!!!
Intersting experiments. Nice job. Thanks for sharing.
This 10 Minutes video explains most of the high school science theories from books.
Thanks :)
@@ElectricExperimentsRobert33 please make a video, how to make motorbike Air pump? using air conditioner compressor . Request 🙏
Awesome collection of all the classic vacuum physics demos. You have an extremely good compressor there. My refrigerator compressor only brought it down to about 1 psi. I would like to see if you can use the vacuum to make a radiometer. Hopefully some HV experiments too?
Nice variety of demostrations. Heck yeah !
Perfect, thank you.
Brilliantly exemplified.
- very interesting, Thanks.
This is very cool. You should make more vacuum experiment vids.
Yea wat he said
Great video! Thank you!
Actually, the boiling point of water drops drastically when you decrease the pressure. If you had left the pump on for long enough and then let the air get back into your chamber, you could have noticed water drops forming on your chamber when the water vapor condensed back into a liquid.
Very good video. Thumbs up. I like the variety of experiments shown. The only thing I would do different is add narration. Thanks for the video. 😃
Yet another awesome project from you! Great job on your vacuum jar it looks really well made! Thats a pretty massive AC compressor as well lol You certainly spend alot of time paying attention to detail :)
great demonstrations sir! 👍
Cool video!
bravo,c'est super!
This 10 Minutes video explains most of the high school science theories from books
Umm no, more like a chapter from Physics books.
Extremely interesting. Thanks!
+jolsky11 :)
I've always wanted to be able to get the dents out of my plastic bottles now I have a way to do it thanks!
Did you get those dents out ?
Very nice demo!
Thank you for making this video
What would happen if an Apollo astronaut was inside a vaccine chamber with the same exact suit he had on and same 5.2 psi inside the suit? But they seemed to have such a good time in their deflated suits with no complaints of atmospheric pressure or trouble breathing or hyperventilating, ever! Amazing!
I meant VACCUM but the auto-correction changed it.
It did it again... I typed VACUUM ... Ok now I hope it remains the same. Maybe someone should ask Buzz Aldrin to swear on the Bible he was in a vacuum and see if he can spell it.
earth is flat my friend
KD35 durant wkwkwk
9:45 You could put a rubber hose on the compressor discharge and direct all that oil mist into the bottom of a plastic coke bottle packed with polyester floss from an old stuffed animal or sofa pillow. That would absorb all the oil, then you won't be breathing that nasty stuff and it won't cause pneumonia or lung damage.
We can still hear the bell because of the contact with the ground, if it was suspended we wont hear a thing in the vacuum.
HENNI Mohamed Bravo, you have understood this thing ;)
Electric Experiments Roobert33 thank you, keep up the good work.
incandescent bulbs contains vacuum, meaning no oxygen to burn the filament, but with oxygen easily it oxidized the filament
Chang si Chong Yes ;)
I can see clear now! thanks. ...
Very nice mate ;-)
Thanx for sharing.
THUMBS UP☆
Great setup, I have to get something like this.
Thank you, very god demonstration.
if isolated for that purpose, we could ear silence with a bell ringing, just there...that would be nice:)
Great excellent video.
awesome demonstration!!!
very interesting as always, your videos demonstrate principals that everyone should know, in the most interesting way. keep up the good work
رائعه ربنا يوفق القائم على القناة
Thank you ,for sharing your experience.
Rui Lopes :)
I would very much like to know the specifications of the machine as I intend to build one myself. Specifications such as compressor power and pressure level inside the chamber.
Thank you.
Nice.... I was waiting on the marshmallows.
Nice glass you use ;)
the part with boiling water was quite nice ignoring the fact that water vapors are damaging for the compressor
"Electric Experiments" Roobert33
No, you are mistaken. The boiling point of water changes in relation to pressure. This property is exploited in heat pipes. SCIENCE!
Adam Bailey I replied to that person that the water that bubbles in the video is at room temperature, I did not specify the details of SCIENCE.
i like how you say the water is bad for the compressor. as if running air through an airconditioning compressor is somehow not bad. (there is moisture in air)
MrEHoss well one thing is to have very small amounts of water vapors from air going inside the compressor and a big thing is to have only water vapors
MrEHoss
That would be refrigerant when it is installed in an air conditioner, not air. The air is cooled by passing it over a heat exchanger (the evaporator).
Way to go Roobert!!! I never get bored seeing your experiments..do try to speak into the mic as well once in a while, at least we can hear your voice too...keep up the experiments and also try to replicate the Testatika machine when you have the time...
Amazing video!You deserve more views than that!
alinionutz8 Thanks :)
Really amazing :))
Amazing! :O
Cool stuff! Like your other vids too!
+careful34 Thanks :)
Could you please mention where you got the pump and where one might acquire one?
very very good video, thank you very much
:)
That is fantastic! I'm surprised you didn't crush the glass bell jar you used near the end. Those things are stronger than I thought. I have a far poorer setup that uses two 12W motors in series. It isn't powerful enough to make water boil. It can make acetone boil. That is really bad on the gasket and polycarbonate bell jar though. I have a cheap vacuum gauge hooked up to mine. I get up to roughly 90kPa of pressure difference max.
Your awesome, thanks for another great vid
That is it! I found at 08:00 way to silent my wife! Awesome! Wife, come here!!!! :D
should be a subtitle at bottom for better understanding.
awesome job
wow your experiments are quite informative, thank you
that fan thing looks so awesome
Me: puts mouth on it
Everyone: Richard nO!
Hello sir. Great job. I want 2 make it fr my engineering project work. Can u guide me up?
that is a great piece setting every school must have to visualize to kids to understand air, pressure and effects. One thing did you have chance the temperature of water after you took out glass chamber?? I know they do sterilize milk and kind of products under low pressure to save energy but would be good maybe leaving a thermometer in the water while you do the experiment.
Thank you!
great video!
Nope this man is clearly some type of wizard
beautiful experiment !
Only problem is this is going to self destruct before too long... the compressor is designed to run with a recirculating oil bath in the freon loop. Without that lubrication, the pump's efficiency and ability to draw vacuum will fall pretty rapidly.
They are good pumps. But this isn't a long term set up.
+kleetus92 It is just to make a video ;)
+pen mightygun yes it would.
Correct! If you run that compressor for about 30 mins without overload the winding might burn-out
You can lube the pump buy dripping oil into it. I have seen long term use of a ac compressor in a car as a air compressor it was just lubed with air tool oil into the input on each use for inflating tires and so on.
This is very nice!!!!
Good job.
COOL its so cool, thanks from colombia