gram-calorie的意思|示意

Gram-calorie (symbol: cal), also known as small calorie, is a unit of energy widely used in many fields. It is the amount of energy required to heat 1 gram of water by 1 degree Celsius. This unit is commonly used to measure the energy content of food and other products.

In food science and nutrition, a gram-calorie is used to measure the energy content of food. One gram-calorie is equivalent to the energy of 4.1868 joules, which can be calculated using the following equation: 1 cal = 4.1868 J. For example, if a portion of food contains 109 calories, by applying the equation, 109 cal = 454.8 J. Thus, the energy content of the food is 454.8 joules.

In other fields such as physics, gram-calories are also used to measure energy. For instance, when a force is applied to an object, the amount of energy required to move the object is measured in gram-calories. They are also used to measure the energy required to raise the temperature of a body.

In short, the gram-calorie is a unit of energy widely used in food science and nutrition, as well as in other fields such as physics and engineering. It is used to measure the energy content of food, and also to measure the energy required to move an object or to raise a body's temperature.