Question

A definition to what a calorie is

Answer 1

Definition:

The energy needed to raise the temperature of 1 gram of water through 1 °C (now usually defined as 4.1868 joules).

Answer 2

Step-by-step explanation:

the energy needed to raise the temperature of 1 kilogram of water through 1 °C, equal to one thousand small calories and often used to measure the energy value of foods.