Question

What is the energy equivalent of an object with a mass of 25 kg?

Answer 1

Answer:

$2.25\cdot 10^{18} J$

Explanation:

The energy equivalent of the mass of an object can be calculated by using the Einstein's equation:

$E=mc^2$

where

E is the energy

m is the rest mass of the object

$c=3\cdot 10^8 m/s$ is the speed of light

For this object

m = 25 kg

So its equivalent energy is:

$E=(25)(3\cdot 10^8)^2=2.25\cdot 10^{18} J$