
I know that the answer to the question "A substance that regulates and ensures the temperature of a device does not exceed safe values is generally called?" is in "Hydrogen is commonly used in power stations as a coolant in generators due to a number of favorable properties that are a direct result of its light diatomic molecules. These include low density, low viscosity, and the highest specific heat and thermal conductivity of all gases.". Can you tell me what it is? 


coolant
