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Results tagged with water
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user 1370
Two Hydrogen atoms covalently bonded to one Oxygen atom. One of the more common compounds on the surface of the earth.
1
vote
Accepted
How to measure resistance of DI water
That DI water has some specific resistance, not resistance!
To measure that, You need a apropriate probe, inserting
the tips of a vanilla ohmmeter into the water, excuse,
is ridiculous! …
- 6,944
3
votes
Accepted
Auto-ionization of water
No, the autoprotolysis equation equilibrium makes the concentration of OH-
to decrease appropriately. Say, the H3O+ is 1 mole/ltr, the OH- will be 10exp-14 moles per liter. If You calculate that prec …
- 6,944
15
votes
Accepted
Why does the water in the toilet move around so much on stormy days?
The vent of the sewer system can develop pressure variations
depending on wind speed by some water-aspirator-like action.
So the siphon in Your toilet works as a pressure differential indicator. …
- 6,944
4
votes
How fast does an ice cube melt in a microwave?
In liquid water we have an effect of relaxation of orientational polarisation. … The same mechanism is responsible for the extraordinary (about tenfold)
mobilities of H+ Ions in water.
Here is a plot of Water spectrum in microwave domain. …
- 6,944
16
votes
Do my noodles cook quicker when the water is boiling or when it is just about to boil?
My instinct would be that food will cook quicker just before the water starts boiling because steam conducts heat slower than water and so when the food is in contact with the steam bubbles it receives … In a pot on a fire,
the surface of the water will be as low as maybe 80 or 90 degrees,
when bubbles raise at the bottom, but do not reach the surface yet. …
- 6,944
6
votes
Why does boiling water in the microwave make a cup of tea go weird?
A common problem with microwave is that you lack control of the
temperature of the water.
Second problem is that the water is heated from the top and the sides of the mug mostly. … So: You have some water close to 100 C at the surface
and colder (containing air) water below.
When You dip in the bag, all that mixes, the air bubbles out. …
- 6,944
11
votes
What happens if you try to freeze water in an water tight container
Yes, of course, the freezing point will decrease by the pressure
developed, while part of the water freezes.
But do not underestimate the pressures! … (Depends on the
rigidity of the vessel and the volume of water)
Here is a video showing how freezing water cracks a cast iron sphere.
(The bath is ice/salt at about -10°C) …
- 6,944
1
vote
Can liquid contain information?
In
the very first computers mercury memory was used.
The mercury was contained in a glass tube,
the information was fed in by some piezodrive at on end,
at the opposite end the information was rea …
- 6,944
1
vote
Accepted
Air Regeneration in Closed Systems
The
production of oxygen takes place
usually via the electrolysis from
water and partly via recuperation from
the carbon dioxide by Sabatier process
and the following methane pyrolysis. …
- 6,944