Questions tagged [water]
Two Hydrogen atoms covalently bonded to one Oxygen atom. One of the more common compounds on the surface of the earth.
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Water Vapour and Liquid Water Interactions
It is known that a certain number of particles in a sample of water have enough kinetic energy to ‘escape’ from their intermolecular bonds and into the gas phase. But what is stopping these water ...
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Is it possible to use a water molecule's expansion/contraction effect with heat as a motor?
When water molecule is cooled, it is well known that it expands:
That's the reason the rocks in the desert explode in the cold of the night: the rocks have water inside that expands with cold and ...
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Is the strongest acoustic signal always the closest?
I have a single beam echosounder that I use to measure the distance to an object underwater. It emits an acoustic pulse and listens to the reflections. Using the time of flight and the strongest ...
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Why does boiling water in the cold instantly evaporate if it is splashed out of a mug?
If I pour boiling water into a mug and throw it out from the balcony in very cold weather (-20 degrees Celsius and below), then it instantly turns into a cloud of steam, even before it reaches the ...
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Is water capacity of air affected by air pressure?
Air can hold water in proportion to partial pressure of water vapor. This is affected by temperature. But is the water capacity of air also affected by ambient pressure?
I did find some answers that ...
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How to find the rate at which water can pass through a semipermeable membrane that allows particles of size lesser than 0.5 mm?
I was wondering what would be the rate at which water would cross a semipermeable membrane that allows particles of size greater than 0.5 mm. Knowing that size of water molecules is 2.75 angstroms ...
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Melting point of water [duplicate]
Wikipedia says about melting point that:
The melting point of ice at 1 atmosphere of pressure is very close to 0 °C (32 °F; 273 K); this is also known as the ice point.
But why it is very close and ...
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The solubility of gases in liquids. Laws and equation [closed]
I am studying the solubility of gases in liquids (flowing then into the study of oscillations of gas bubbles out of the liquid phase).
The task at the moment is to familiarize myself with the laws of ...
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What's the most practical method to calculate Complex Dielectric Constant of Water?
I need to find the real part and imaginary part of Complex Dielectric Constant of Water, in calculation of ITU P.618-9 rain attenuation model. In my calculation using the model, the carrier frequency ...
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How does wetting cotton increase its UV transparency?
Anecdotally, a dry cotton T-shirt prevents sunburn better than a wet one.
This has also been measured (Gambichler et al., "Influence of wetness on the ultraviolet protection factor (UPF) of ...
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How would the volume of a drop of water (from a dropper) on the Moon and other bodies compare to one on Earth? (indoors of course!)
Searching for "volume of a drop of water from an eyedropper", I ran across this answer on Quora:
It depends on the size of the dispensing tip, but generally for a Pasteur pipette it is ...
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What effect does salt have on the boiling speed of water?
My question is the following:
I have two pots. Pot A and pot B. I fill both of them with 1l (litre) of water. Now I add a table spoon of salt into pot A. Which water is going to start boiling first?
I ...
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Electricity through water
If you're sat in a body of water through with an electric current runs, can you survive if you create an earth wire to lead the electricity away from you?
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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, ...
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Using the electrolysis of water to cool a room [closed]
Browsing the internet today I came across this very esoteric paper which purports to describe the construction of a device which uses the electrolysis of water into hydrogen and oxygen (a highly ...
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