In most homes water is made hot by an electric or gas water heater. The electic element or gas flame comes on and heats the water to the required temperature , usually around 135 f in most heaters. The heater then shuts off until it's activated again by a thermostat indicating that the water temperature has dropped.
Check the inlet valve to H/W tank. make sure it's full on. If still no hot water anywhere you need to call a plumber, you have a weird problem.
air lock in hot water pipe
No, cold water is piped into the hot water tank and is heated by electricity or gas, it then flows out to the hot water taps.
It is a water heater, not a hot water heater. There would be little point in using a hot water heater. I assume that is your point.
there are many possibilities. If you had your hot water heater replaced or fixed a water line then it could be air inside your water pipes and should go away after a while. you could have air still inside your water heater tank and when you first run hot water out of a fixture it could from flow bleed into your hot water pipe. If you think it isn't caused by air then your fixture can be the problem either your valve seal is loose or your aerator is bad. If you can find out either its air or water then it would easier to trouble shoot.
...hot water
to make hot chocolate!
No. However water that is too hot may make your scalp dry.
hot water and soap
The hot water expands the lid slightly.
water because when they make maple syrup it is 95% water and to make the syrup better they boil off the water
I don't think that is possible. How can "hot" make "cool" water "cold"? (also, 'hot ice' is boiling water)
you look on you tube under intently frozen water you cant make hot water once you touch it because eat the moment it gets colder then it wont be hot water it will be cold water
You can't use steel to make a hot water tank because steel can rust.
the energy that a bath of hot water is thermal energy because the bath water ransfers to you to make you warmer and the bath water colder.
make it cold or make it hot
Hot water will make sugar dissolve faster compared to cold water because the increased temperature causes the sugar molecules to move more rapidly and interact with the water molecules more effectively.