Multiple choice

One calorie of energy is equivalent to

  1. 0·42 joule

  2. 4·2 joule

  3. 42 joule

  4. 420 joule
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

One calorie is defined as the amount of heat required to raise the temperature of one gram of water by one degree Celsius, which is approximately 4.2 joules.

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