It may be more a question of time as opposed to temperature, as at boiling point water starts to become steam, if you boiled the water for long enough, it would eventually completely evaporate, the process could of course be sped up by raising the temperature.
In a closed system one can heat water well obove 250 DEG F BUT not advisible
the gas stays on but the water still doesn't get hot
Yes, your gas water heater will still distribute hot water.
By hiring a plumber...
Never
I recomend hot water as gasoline is still an oil product and will be greasy
At 60̊ C water is very hot. Too hot to put your hand in, but it's still water. It isn't steam/water vapor/boiling.
About 60 gallons , if it is new. This amount will diminish over time because of sediment build up and corrosion. And while using hot water continuously the temperature of the water will decrease as you reach the water heater capacity because it is mixing cold water with the already heated water to replenish what is lost. Thus, the modern age of tankless water heaters. If sized, installed properly you can run hot water at an exact temperature for as long as you want. Fill a tub, still have hot water, in fact, fill a pool, and still have hot water.
I have a promblem with that too, my car would overheat very fast, it was a faulty NEW thermostat. It still runs hot, I think I need a new water pump
The difference in water density (hot-cold) is very small, compared to the difference in density between water of any temperature, and your body. That is, even hot water is more dense that we are, so we still float.
it should be hot but it still should have water to...
If your gas gets turned off, you may not have hot water available because most water heaters rely on gas to heat the water.
Never, But you would still need to drink cold water