Question

What is the numerical quantity of the ratio rest energy/rest mass?

Answer 1

Answer: 9 × 10¹⁶ m²/s² (square of speed of light in vacuum)

Explanation:

Einsteins' energy mass relation:

E = mc²

Where, E is energy, m is mass and c is the speed of light.

The ratio of rest energy to rest mass:

$\frac{E_o}{m_o} = c^2$

speed of light in vacuum is 3 × 10⁸ m/s

Hence, the numerical quantity of the ratio of rest energy/ rest mass = (3 × 10⁸ m/s)² = 9 × 10¹⁶ m²/s².