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apply a force of 1 Newton over a distance of 1 meter.Joule should not be interchanged with Newton-meter (N.m) since the latter is used as a measure of torque while the Joule is used to describe heat and

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. The abbreviation for joule is J in capital since it is derived from a proper name.Meanwhile, calorie is the amount of heat that is needed to raise the temperature of 1 gram of water from 15 to 16 degrees Celsius. Calorie is typically used to measure your energy requirements and the energy content of your food. But the calories referred to in food are usually kilocalories which is equal to 1000 calories. You cannot hear the usage of calories anymore in Physics, if so you will only seldom hear it since it's considered to be outdated in contexts.

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