Question

In mass-energy equivalence, energy equivalent to 1 amu is ______.

Options

• 200 MeV

• 931 MeV

• 190 MeV

• 1.67 × 10⁻²⁷ MeV

Answer 1

In mass-energy equivalence, energy equivalent to 1 amu is 931 MeV.

Explanation:

According to Einstein’s mass-energy equivalence relation,

E = mc²

For a mass of 1 amu:

1 amu = 1.66 × 10⁻²⁷ kg

Therefore, E = (1.66 × 10⁻²⁷) (3 × 10⁸)²

= 1.494 × 10⁻¹⁰ J

Converting joules into MeV:

E ≈ 931 MeV

Hence, the energy equivalent of 1 amu is 931 MeV.