Calories are units of energy. We often associate calories with food, but in fact they apply to any substance that contains energy.
Most of us associate calories with what we eat or drink, such as "This soda contains 200 calories". In fact, the calories listed on food packaging are calories, which is equivalent to the heat required to raise 1 000 grams of water from 14.5 degrees Celsius to 15.5 degrees Celsius at1atmospheric pressure.
Extended data
Daily calories required by adults:
Daily calorie requirement of adults = basic calorie required for basic metabolism of human body+calorie required for physical activity+calorie required for digestion of food.
Heat required for digesting food = 10% x (minimum heat required for basic metabolism of human body+heat required for physical activity).
Daily caloric requirement of adults = 1. 1 x (minimum basal caloric requirement for basic metabolism of human body+caloric requirement for physical activity).
Male: 9250- 10090KJ
Female: 7980-8820 kJ
Note: The daily calories provided by food should not be less than 5,000-7,500 kilojoules, which is the least energy to maintain normal life activities.
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