Physics Concepts and Definitions

What does the term calorie actually mean?
Answered by HowStuffWorks
  • HowStuffWorks


  1. A calorie is a unit of measurement used to calculate the amount of energy, or heat, absorbed or released by a given substance. A single calorie is the amount of energy needed to raise the temperature of 1 gram (0.35 fluid ounce) of water by 1 degree Celsius (1.8 degrees Fahrenheit). In the physical sciences, the calorie as a unit of energy has been replaced by the joule; one calorie equals 4.184 joules.

    BTUs (British thermal units) are also used to measure energy; a BTU is equal to 252 calories, or the amount of heat needed to raise one pound of water (0.45 kilograms) by one degree Fahrenheit (0.56 degrees Celsius).

    More answers from HowStuffWorks »

Still Curious?
  • Will the Large Hadron Collider create a black hole?

    Answered by Science Channel

  • Why is Einstein considered the father of modern physics?

    Answered by Science Channel

  • Can humans breathe in liquids?

    Answered by Science Channel


What are you curious about?

Image Gallery