What is the definition of a calorie ?

Question

I was woundering how many people could come up with the meaning of a calorie. We know it is something in food ,But what is it really? Thanks for your time and your answers.

Answer 1

A calorie is a unit of measurement for energy. The unit's name 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 In most fields, it has been replaced by the joule, the SI unit of energy.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 energy obtained from food. Many different definitions for the calorie emerged during the 19th and 20th centuries. They fall into two classes:

* The small calorie or gram calorie approximates the energy needed to increase the temperature of 1 g of water by 1 °C. This is about 4.185 J.
* 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 4.185 kJ, and exactly 1000 small calories.

In scientific contexts, the name "calorie" refers strictly to the gram calorie, and this unit has the symbol cal. SI prefixes are used with this name and symbol, so that the kilogram calorie is known as the "kilocalorie" and has the symbol kcal.

Colloquially, and in nutrition and food labelling, the term "calorie" almost always refers to the kilogram calorie. This applies only to English text; if an energy measurement is given using a unit symbol then the scientific practice prevails there. A convention of capitalising "Calorie" to refer to the kilogram calorie, with uncapitalised "calorie" referring to the gram calorie, is sometimes proposed, but neither recognized in any official standards, nor commonly followed.

The conversion factor between calories and joules is numerically equivalent to the specific heat capacity of liquid water (in SI units)

Answer 2

Calorie: A unit of food energy. In nutrition terms, the word calorie is used instead of the more precise scientific term kilocalorie which represents the amount of energy required to raise the temperature of a liter of water one degree centigrade at sea level. The common usage of the word calorie of food energy is understood to refer to a kilocalorie and actually represents, therefore, 1000 true calories of energy. A calorie is also known as cal, gram calorie, or small calorie.

Answer 3

I can't site a source, but from H.S. science I remember it is the amount of energy needed to raise one ml of water one degree in temperature. What does that really mean? It means your body needs then to give you fuel to move your muscles. It also means that calories without nutients ( Like white flour and beer) will only give you a quick sugar rush, but won't help your body perform like it should.

Answer 4

It's a troublesome little creature with far too many friends who all favor banding together and hanging out in groups...places like your fanny, your hips, your tummy. Miserable wee critters that, by all rights, ought to be extinct by now, but instead seem to be multiplying and taking over the world. We must all arm ourselves with knowledge of ways to exercise - this seems to be about the only natural enemy these creatures have.

Answer 5

The quantity of thermal energy required to raise one gram of water 1°C at 15°C

Answer 6

Karan has it right. So here is a question for you. How do you make a hormone? Don't pay her (whore moan).

Answer 7

girl's answer: something to avoid.

boy's answer: something to consume.

Answer 8

FAT good or bad !111111111S

Answer 9

oh