Power is expressed in Watts
Hertz
hertz
In the SI ( Système Internationale), the unit for energy is the Joule.
Calorie
"Heat", as used in physics, refers to heat energy - and the unit for any type of energy is the joule.
The unit to express power is YOUR MOMMA
the unit used to express power is time
Calorie is the unit used to express chemical energy in food.
the unit used to express power is time
Electrical power is also measured in Watts.
Hertz
There are many units that cannot be used to express a volume.There is something missing from your question to request the only unit.
This question presents several difficulties.There is a unit called "square feet", used to express area, and another unit called "cubic feet",used to express volume or capacity. But there is no such unit as "cubic square feet".There is also a unit called "feet", used to measure length or distance. Since it doesn't expressarea or volume, it's completely unrelated to the two units listed that DO exist, and even lessrelated to the unit that DOESN'T exist.So the question strikes out in several respects.
Unit conversions express an amount in a different unit.
kelvin
hertz
Erg.