A calorie.
Calorie is the unit used to express chemical energy in food.
erg
Any unit of energy can be used to describe the energy content of food.
You are confusing power with energy. A kilowatt is a unit of power, not a unit of energy.
calorie--
A Calorie
1) The unit for any type of energy is the joule. 2) In some contexts, such as food, the old-fashioned unit "calorie" is still used.
calories
Calories are the standard unit.
A calorie is simply the unit of energy in any given food. What differs is whether the calories being comsumed come from healthy food that provides nutrients to the body, while providing energy.
The SI unit for energy - any type of energy - is the joule. For food, another unit, the calorie, is still often used.
A joule / second is a watt. The watt is a unit of power. In general terms, power means energy expended, produced, or transferred, per time unit.A joule / second is a watt. The watt is a unit of power. In general terms, power means energy expended, produced, or transferred, per time unit.A joule / second is a watt. The watt is a unit of power. In general terms, power means energy expended, produced, or transferred, per time unit.A joule / second is a watt. The watt is a unit of power. In general terms, power means energy expended, produced, or transferred, per time unit.