Question

How many joules are present in one calorie?

Answer 1

1. The amount of work a body can do is called its energy.
2. Thus, work and energy are directly related to each other.
3. Energy = work done
4. The SI unit of energy is Joule (J).
5. Another unit of energy is calorie.
6. The two units are related as,

$$\begin{gathered} 1\mathrm{calorie}=4.186\mathrm{joule} \\ 1\mathrm{calorie}=4.2\mathrm{joule} \end{gathered}$$