The liter.
25 cm3 or more.
If you hold the bulb end, the thermometer will measure YOUR temperature instead of the temperature of the medium that you wish to measure.
The answer depends on what aspect you wish to measure: its mass, its area, its depth, the volume of water that it can hold, etc.
millilitres
Hold on, I'll grab a tape measure and measure him: should be within 1 or 2 metres.
You could collect it in a container and cool it down and measure the quantity of water. Or you could hold a thermometer so that its bulb is in the steam to measure its temperature.
If your car will not hold water you should first check your radiator for holes and leaks. This should be done with the engine turned off. If you do not find any leaks coming from the radiator and the water stays inside, turn on your vehicle and let it idle. If you notice water leaking from the vehicle while it is running, then your water pump is bad and will need to be replaced.
relative humidity
it depends what type of ballon it is, and how big the ballon is
if theres a flood . you should hop in the water and hold your breath , and if you cant do that your skrewed
go find out on your own
Saturn. And then the water freezes...