All Questions
74
questions
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26
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Does air gap between enclosed chamber and manometer influence the manometer reading?
We have an enclosed chamber filled with water. From the top of the chamber there is a metallic tube connecting the chamber to a monometer. We increase the pressure of the water inside the chamber buy ...
1
vote
1
answer
12
views
How carbon water filter can build air pressure inside (before installation)? [closed]
Today I got a new refrigerator carbon water filter. Before installing, out of curiosity, I dripped a bit water into the filter’s outlet to see if water could flow in and out. Obviously it did… Then, ...
- 11
3
votes
4
answers
493
views
What is the physical reason for why hot air holds more water vapour, and how does this relate to saturation vapour pressure?
It is said that hot air holds more water vapour.
I guess this means that the saturation vapour pressure of water in air increases with temperature. Is this correct?
How can one derive this result? ...
- 357
2
votes
1
answer
48
views
Can you make $\rm H_2O$ out of the air with tools anyone has? [closed]
I was just wondering if you could make $\rm H_2O$ out of the air with tools that everyone has?
-1
votes
1
answer
48
views
Snorkeling vs diving with a breathing cylinder
If diving with 5m snorkeling pipe our lungs would collapse due to 0.5 atm difference, right?
If diving with a cylinder that has air with atmospheric pressure (the pressure our lungs can use), we can ...
- 291
1
vote
1
answer
54
views
How to harvest water passivley?
I have been reading recently about methods to collect moisture from the air passively and turn it into water. However, is there any attempt currently for small-scale water harvesting?
Methods I have ...
- 13
0
votes
0
answers
33
views
Bird drink feeder -- How to make water come out automatically and stop coming out from a bottle? [duplicate]
I am watching a video about a DIY bird water feeder.
https://www.youtube.com/watch?v=q6EitavSRNg
In the video, three holes were punched from the plastic bottle in a triangular pattern, and then the ...
- 31
0
votes
0
answers
40
views
Why isn't water thermal capacity used to easly cool the air in a room?
Why isn't water thermal capacity used to easly cool the air in a room? Would it be energetically cheap to use cold water as a room air cooler and when the water temperature reaches some limit it is ...
- 1,815
0
votes
2
answers
2k
views
How is it possible to calculate the water content of air in liters ( from relative humidity and temperature )?
My home has 150 m3 air. I would like to calculate, that how much liters of water this air contains, if the temperature is 25 C° and the relative humidity is 60%. I would like to calculate it for 26 C° ...
- 297
0
votes
2
answers
399
views
Is the buoyant force of air implicitly neglected for an object half-inmersed in water?
I saw in this answer that the atmospheric pressure is conveniently canceled mathematically when taking the atmospheric pressure at the level of the top of the object.
However, when I was inventing ...
- 493
1
vote
1
answer
50
views
Creating a Bouyancy Force Generator
How much energy is needed to maintain boiling water? (I'm assuming $1400~\rm W$). With that said, when air is added to an object to decrease its density, does the strength of its buoyant force ...
0
votes
1
answer
5k
views
What is the formula to calculate the amount of water in the air at a certain temperature and relative humidity?
I'm trying to find a formula that will give me as a result, the amount of water in a cubic meter of air.
I have read this question How to calculate the volume of water in a certain amount of air, ...
0
votes
1
answer
1k
views
Pool cover efficiency of absorbing and retaining heat in pool water
Looking into the options of adding and retaining heat in the outdoor pool (and saving wallet) - heat inverter, roof solar water heater, gas heaters etc. the pool cover seems to rule them all (at least ...
- 111
0
votes
1
answer
862
views
How much can water compress air?
So I was thinking of using a barometric sensor to measure the compression of air in a tube in order to measure water level in a tank (Basic diagram below).
So based on the equation $ \frac{P_1 V_1}{...
2
votes
2
answers
316
views
Why has warm air a higher water saturation than cold air?
I've wondered about that for a while but all I read is commonly just "Warm/hot air has a higher energy so when it hits the surface of a liquid, it has a higher probability to transfer energy, ...
- 1,507