How does a calorie compare to a joule?
A calorie is equal to 4.18 joules and 1000 calories is equal to 1 Calorie. A Calorie with a capital "c" is what food is measured in.
Why do you suppose scentists use the joule as the unit of measurement of energy insteasd of the calorie?
The two main units of Energy are the Joule and the Calorie. The Joule is normally represented as the KiloJoule (kJ), which is equivelent to 1000 J. The Calorie is represented as Kcal. 2000 Kcal (calories) is given as the Guideline Daily Allowance for most adults. 1 calorie = 4.184 J or equivalently, 1 kcal = 4.184 kJ Google calculator: http://www.google.com/search?q=1+calorie+in+joules&btnG=Search Wiki Joule entry: http://en.wikipedia.org/wiki/Joule Wiki Calorie entry: http://en.wikipedia.org/wiki/Calorie
Calorie is the unit of heat energy in cgs system. One calorie is the heat energy required to raise the temperature of one gram of water through one degree Celsius. But in MKSA system of units, joule is used as the unit of heat energy. One calorie is equal to 4.180 joule. Calorie is usually used in bio chemical changes.
calorie and Calorie . . . "small calorie" and "large calorie" . . . the common units of energy before the SI system of units was introduced. "small" calorie . . . "gram" calorie energy to warm 1 gram of water 1 degree C. 4.184 joules "large" Calorie . . . "kilogram" Calorie, "kilocalorie", the food calorie energy to warm 1 kilogram of water 1 degree C 1,000 small calories 4,184 joules
The standard unit for heat energy is the same as for any other type of energy, namely the Joule. For historical reasons, some other units are sometimes used, e.g., calorie, or BTU. But if you want to do calculations with SI units, any energy should be measured in Joule, to be consistent. The standard unit for heat energy is the same as for any other type of energy, namely the Joule. For historical reasons, some…
Like Angelina Joule? [Joke] It doesn't work that way; a joule isn't equivalent to a temperature reading. Joules and calories measure energy, but you wouldn't ask how hot is a calorie since I expect you're more familiar with this unit. How much will one joule raise the temperature of one gram of water is a better question. But you didn't ask that.