The calorie (symbolized cal) is a unit of heat occasionally used in the centimeter-gram-second (cgs) system of physical units. Heat is a form of kinetic energy transfer from one medium or object to another.
When 1 cal of heat energy is transferred to one gram (1 g) of pure liquid water, the temperature of that sample of water is raised by one degree Celsius (1º C) or one degree kelvin (1º K), provided the water temperature is above the freezing point and below the boiling point. When the temperature of 1 g of pure liquid water falls by 1º C or 1º K, that water gives up 1 cal of heat energy. (The Celsius degree and the Kelvin degree represent a temperature increase or decrease of the same amount, although the scales are offset by 273.15.) One gram of pure liquid water has a volume of one centimeter cubed (1 cm3) or one milliliter (1 ml).
In nutrition, a unit called the kilocalorie, also known as the diet calorie, is frequently mentioned. This unit is equivalent to 1000 cal, and is the amount of heat energy required to raise or lower one kilogram (1 kg) of pure liquid water by 1º C or 1º K. When the label on a package of food says that a serving contains 200 calories, it means that the sample would yield 200 kcal (not 200 cal) of heat energy if subjected to complete combustion. Kilocalories are used (and misused) to express the amount of food consumed in a serving, a meal, or a day. It has been said that a surplus of 7700 kcal of food intake will result in a mass gain of 1 kg, or that a surplus of 3500 kcal of food intake will produce a weight gain of one pound (1 lb), which represents 0.454 kg in the gravitational field of the earth at the surface. Some nutritionists and physicians, however, point out that this is a simplistic view, and can lead to abusive dieting and the neglect of physical activity as a factor in the maintenance of ideal weight and overall health.
2007-01-17 23:41:05
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answer #1
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answered by Anonymous
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Calorie is actually a term for one kilocalorie, which is the amount of heat required to raise the temperature of water. A gram of fat is 9 calories, while a gram of protein or carbs is 4 calories.
Calories are the energy provided by food which work as fuel for your body. As protein, carbs, and fat, they have different functions in your body, but basically, you need to consume an amount of calories every day to keep your body weight.
There is no required amount just like there is no daily limit - it comes down to your appetite and your body's needs. Some people have active lifestyles, fast metabolisms, and can eat almost anything and not gain a pound. Other people have sedantary lifestyles or slow metabolisms (or both) and struggle with weight because even a normal amount of food will cause them to gain weight.
If you eat a balanced meal and are still hungry, you should try waiting around 10-15 minutes. If after that, you are still hungry - genuinely hungry - then eat something. But go for something that is good for you, not junk food, and eat only until you are no longer hungry, not necessarily until you are full.
2007-01-17 21:56:33
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answer #2
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answered by thebobcatreturns 3
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calorie is the unit of energy...
1 calorie = 4.130 joules...
A calorie is a unit of measurement for energy.
Calorie is French and derives from the Latin calor (heat). In most fields, it has been replaced by the joule, the SI unit of energy. However, it remains in common use for the amount of food energy.
The small calorie or gram calorie approximates the energy needed to increase the temperature of 1 gram of water by 1 °C. This is about 4.184 Joules.
The large calorie or kilogram calorie approximates the energy needed to increase the temperature of 1 kg of water by 1 °C. This is about 4.184 kJ, and exactly 1000 small calories.
I hope u got the answer...alll the best...
2007-01-17 21:55:39
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answer #3
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answered by ROBUSTMAN 2
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The calories will give the energy value of the food. You may eat small quantity of high energy food, which may give required calories to the body, but to fill your stomach to its satisfaction your food must contain some bulk (sufficient quantity) in the form of foods made of cereals, fruits and vegetables, rather than pure starch products.
2007-01-17 22:23:49
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answer #4
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answered by Kutty_21 4
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properly you want a undeniable quantity of energy in line with day on your physique to easily do its familiar applications, like respiration. So i woudlnt advise eating purely 1000 thats very low. attempt to get slightly exercising in on a daily basis, or thrice a week on the gymnasium or something, you will shed extra pounds lots quicker by using eating greater healthy and dealing out slightly, then purely slicing energy. additionally in case you consume too little, your physique will bypass into starvation mode and you will actually initiate turning each thing your eating at once into fat considering that your physique is storing any food for later reason its uncertain once you will consume returned. So, eating that little can positioned you in starvation mode which will actually do the different of what you %. exercising additionally releases endorphins which make you chuffed, and who doesnt wanna be chuffed!?
2016-10-31 10:24:17
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answer #5
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answered by ? 4
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calorie doesn't do anything with hunger............
calorie is just a pack of energy........to define , it is an amount of energy needed to raise the temperature of water by 1celsius.......it is the energy needed to do some work
2007-01-17 21:52:55
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answer #6
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answered by blak 1
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unit of energy
2007-01-17 22:25:29
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answer #7
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answered by wild joe 2
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