Question

20 calories of heat are supplied to 1 gram of water. Calculate how much is the mass of water increased.

Answer 1

why has the mass increased?

Answer 2

according to the Einstein's formula, the mass of water is increased by this quantity:
\[\Large \Delta m = \frac{Q}{{{c^2}}}\]
where \(Q\) is the amount of heat provided, and \(c\) is the light speed in vacuum.
Please use \(Joule\) to measure \(Q\)