All Questions
24 questions
0
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52
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Can sublimation explain why flavored water can suddenly freeze when being taken out of a freezer?
I've experienced taking a liquid ice bar sealed in plastic and it suddenly is completely frozen. Could this be sublimation?
0
votes
2
answers
130
views
Inflation of a balloon in space
Let's hypothesize there is a flat ballon in space (vacuum, no gravity and no external pressure), which is connected to a gas pump. The gas and the material of the balloon doesn't interact. At a ...
- 1
2
votes
1
answer
165
views
Why does the bottle create vacuum inside if left closed?
I'm not 100% it's correct but it has happened to me a lot of times, I always close down a bottle normally with not too much tightness, with no liquid inside, and after a day it always is so hard to ...
- 69
1
vote
2
answers
194
views
Adiabatic free expansion into vacuum
Consider an adiabatic vessel with a partition and a plug in the partition wall. On one side of the partition, there is gas at certain pressure and on the other side of partition there is perfect ...
- 11
3
votes
1
answer
73
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Theoretically: If I released a giant cloud of Oxygen into space, would you be able to hear sound inside of it before it dissipated?
If I released a giant cloud of Oxygen into space, would you be able to hear sound inside of it before it dissipated?
From my understanding, the reason there is no sound in space is because there are ...
1
vote
2
answers
526
views
Formula of enthalpy in vacuum?
Enthalpy can be expressed as $H = U+PV$.
From what I have read on the internet, $PV$ is the energy that was required to create space for the system in the environment. Like one famous example I have ...
- 242
0
votes
1
answer
57
views
Pressure dropped in vacuüm chamber after vacuuming the chamber and closing it. How?
I was doing a leak test for a low vacuüm application by vacuuming a small chamber to 60 mbar and then measure the pressure for 16 hours at constant temperature. I chose 60 mbar to prevent evaporation ...
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1
vote
2
answers
129
views
Would lotion pumps work in a vacuum?
I'm just trying to understand how a lotion pump works. I watched this video and it's explained that it's due to the difference in air pressure.
https://www.youtube.com/watch?v=EJVL5zXIPLA&...
- 415
0
votes
1
answer
288
views
What will happen when a gas cylinder is taken to space (vacuum)?
Inside the atmosphere, I guess the atmospheric pressure negates the pressure exerted by the gas that's inside a gas cylinder. However, when taken to a vacuum (space), Will the gas cylinder burst due ...
- 1,028
0
votes
1
answer
363
views
How long does it take the water in a pan to evaporate with 40 ° C?
I have a problem.
I would like to calculate after how many minutes / hours the water in a $50$ cm diameter pot, $50$ cm high, evaporates completely.
The temperature is constant, $40^o$C
the pressure ...
- 103
0
votes
1
answer
99
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Question about "suction" , and overall physics, in this Whoosh Bottle Experiment
https://www.chemedx.org/blog/there-more-whoosh-bottle
So this is a pretty standard "Whoosh Bottle" experiment, but with a twist, in that he covers his hand (palm) on the bottle after the ...
0
votes
1
answer
212
views
Will water in vacuum stop boiling?
Will water in vacuum chamber (low pressure chamber(around 0.02 atm)) stop boiling when the remaining air gets saturated? Or if the walls of the chamber are cold enough the water vapor condensates and ...
- 89
1
vote
1
answer
3k
views
Why does blending hot food in the Nutribullet blender create a "pressure seal"?
I have noticed that when blending cold foods in the Nutribullet, it is easy to unscrew the blender once the blending process is finished. When I blend something hot (i.e, boiled tomatoes, to create a ...
- 497
9
votes
1
answer
1k
views
How did Torricelli know that he created a vacuum?
I have read about the experiment of Torricelli, he filled a tube with mercury and placed it standing in a basin filled with mercury, then mercury poured out into the basin from the tube. He concluded ...
- 91
0
votes
2
answers
4k
views
Confused with pressure and condensation
I'm confused with pressure and condensation of a gas inside a sealed container. Say I boil a liquid to it's gaseous state inside a sealed container and exert more pressure on that container then ...
- 247
0
votes
3
answers
141
views
Could pressure differentials be used to produce power?
There is potential energy between something like a vacuum in a container and a gas on the outside of it, or vice-versa. Could this energy be harvested in a vacuum, or close to vacuum situation like on ...
- 131
0
votes
3
answers
2k
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Why is water inside a vacuum chamber not boiling?
I have a vacuum that shows a max vacuum gauge reading of 23"Hg when connected to a chamber. When placing room temperature water inside vacuum, the water doesn't boil.
I have seen this chart before ...
- 9
0
votes
2
answers
71
views
What's happening if we vacuum an air that exists inside aclosed system?
Excuse me, I have a closed system and wanted to vacuum an air that exists inside it, so what is happening with temperature inside that system ? Is it increase or decrease ?
0
votes
1
answer
118
views
Why do solids cool when put in a vacuum chamber?
I was watching this video on YouTube where some snow was put in a vacuum chamber, and it cooled down a fair bit after depressurizing. Why is this? I understand that a gas would cool down because it ...
- 635
0
votes
1
answer
119
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Pressurizing with nitrogen vs vacuum? [closed]
pressurizing with vacuum causes volatilization of liquid.
- 325
1
vote
1
answer
231
views
Methods to solve a vapor pressure equilibrium question with water on the moon? [closed]
"Imagine a tall column of water on the Moon, maintained at a temperature of 50°C and left to the open vacuum at the top. Up to what depth will the water continue to boil? The Moon's radius is 0.273 ...
0
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1
answer
2k
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Vacuum pressure equivalent in a siphon hose filled with water?
So, I was thinking about how siphons worked today, and no matter how high or low the tube goes, as long as the end is lower than the start, water will flow. So, if you took a hose, ran it up 50 feet,...
- 427
0
votes
3
answers
6k
views
If I take a bottle of air into space, and open it, then close it and come back to earth and open it one last time, what would happen?
I was reading this post, but no one seem to go further as to say what would happen if you brought the bottle back to Earth? Another thing I want to know is, what would now be in the bottle?
- 33
20
votes
7
answers
7k
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What would actually happen to a person jettisoned into space?
Alright, so we have all seen the movies where someone gets blasted out of the airlock on their starship, or their suit decompresses while on a space walk. The poor schmoe usually either decompresses ...
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