Question

(ii) Assuming the energy released during core bounce and supernova phase of this neutron
star was 2 MeV per neutron, calculate the total energy output of the supernova in
ergs. Note that 1 MeV = 1.6 × 10−6 ergs. (2 points)

A. 1.5 × 1063 ergs
B. 3.8 × 1051 ergs
C. 7.7 × 1051 ergs
D. 7.7 × 1057 ergs
E. 4.8 × 1057 ergs

Answer 1

Answer on Question #54929, Physics / Astronomy | Astrophysics

E = (Number of neutrons) × (Energy per neutron)

E = 2.4 × 10⁵⁷ neutrons × 2 MeV/neutron.

1 MeV = 1.6 × 10⁻⁶ ergs, than:

E = 2.4 × 10⁵⁷ × 2 MeV × 1.6 × 10⁻⁶ ergs/MeV

E = 2.4 × 2 × 1.6 × 10⁵¹ = 7.7 × 10⁵¹ ergs.

Answer: E = 7.7 × 10⁵¹ ergs (C)

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