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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Why isn’t $\rm H_2 O$ a primordial element? [closed]
We’re told the universe was very hot and energetic immediately after the Big Bang, and just shows H2O was present early on. Yet, it is not considered to be a primordial element. Why is that?, and what ...
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Could one perform a test to determine whether water was warmed by a microwave rather than over a flame?
If I warmed two cups of water from 20 °C to 90 °C, one in a microwave and one over a flame. Is there a test that could be performed to determine how each cup was warmed? Are there residual effects ...
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Any method for measuring hydroxyl and hydroperoxyl radicals in water?
I am looking to irradiate water containing some amounts of iron and would like to measure the amount of hydroperoxyl and hydroxyl radicals produced in real time as a result of the irradiation. Is ...
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Enthalpy of formation function of temperature
Why is the enthalpy of formation a function of the temperature?
We can see in the dedicated tables (such as JANAF),
that the enthalpy of formation changes with temperature.
Doesn't the enthalpy of ...
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Why do hot water droplets persist in cooler water?
I notice this phenomenon typically when mixing hot or warm water with cold water. Basically, tiny droplets of hot water travel inside the body of cooler water and persist. I have included a photo of ...
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Formation of wave ripple fields (in sand)
I've read a few articles about wave ripple fields:
https://www.coastalwiki.org/wiki/Wave_ripple_formation
https://en.wikipedia.org/wiki/Wave-formed_ripple
and a few others.
However, those two ...
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Could a fish swim out of a sphere of water in a zero-gravity environment?
Can a fish swim out of a sphere of water in a zero-gravity environment?
I am going to state some assumptions.
We assume the sphere of water is not affected by any thermal properties of its zero-...
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Melting of 2 circular ponds after winter
Two circular ponds of equal depth have various diameter. Both ponds are situated not far from each other and are subject to the same winter conditions. When the spring comes, the ice cap starts ...
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Since water is a molecule, can the aerosol sprayed through double slit form interference pattern?
A water molecule is made of 1 oxygen atom and 2 hydrogen atoms, so it is very small, like quantum scale small. So if I accelerate a bunch of these water molecules through the double slit using a spray ...
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Difference between Kopp-Neumann and Dulong-Petit law?
So this is basically a follow-up to this question: How many degrees of freedom does the water molecule have?
I've done some further research and found that the main difference between Dulong-Petit and ...
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How many degrees of freedom does the water molecule have? [duplicate]
This is mainly a question about molar heat capacity. I've read many different values for the degrees of freedom of water, for example f = 12 on (https://en.wikipedia.org/wiki/Molar_heat_capacity).
But ...
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Why does more ice melt slower than less ice?
I know that ice cubes that are larger melt slower because of their surface area. However, when you put more ice cubes in a cup, all the cubes melt slower than a cup with less cubes. I hope this makes ...
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Shape of a static capillary surface
I am studying the effects of surface tension and in particular the shape of a capillary interface in hydrostatic condition.
Let's recall the Young-Laplace Equation
$ \Delta P = \sigma \bigg(\frac{1}{...
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Number of fog droplets in the air
I have an issue with the official solution to this problem from BelPhO:
Visibility on the road is 100 m. Assuming that the diameter of a fog
droplet is 1 micron, estimate the concentration of fog ...
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Why there is water produced on the phone if we keep our phone in our pocket for a longer time?
one day I kept my phone in my pant pocket, I haven't opened it for a long time. My phone is covered with a plastic case. So why the phone is getting wet when I observed it after some time even though ...
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