Answer:
4.2 joules
Explanation:
Calorie is unit to define quantity of energy and also heat.
One calorie is the amount heat energy required at one atmospherics pressure to raise the temperature of one gram of water by one degree Celsius.
A food calorie is used to measure the quantity of energy present foods and beverages which we eat.
It can be defined in terms of joule and one calorie is equal to 4.2 joules.
