Physics
Grade-9
Easy

Question

1 cal = ___ J

  1. 1000
  2. 2.4
  3. 4.2
  4. 3.6

hintHint:

1 cal = 4.2 Joules

The correct answer is: 4.2


    Joule is the unit of work whereas calorie is the unit of energy. As energy and work are inter-convertible, we can find experimentally that when approximately 4.2 joules of work is converted to energy, 1 calorie of energy is produced and when 1 calorie of energy is spent approximately 4.2 joule of work is done.

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