MDCAT Physics MCQ #2853

If a neutron star converts 0.7% of its mass to energy, what is the energy released? (Given: mass = 2.8 × 10³⁰ kg, c = 3 × 10⁸ m/s)

MDCAT Physics MCQ #2853

  1. Question 1

    Q1. If a neutron star converts 0.7% of its mass to energy, what is the energy released? (Given: mass = 2.8 × 10³⁰ kg, c = 3 × 10⁸ m/s)

    • A) 1.8 × 10⁵⁰ J
    • B) 2.1 × 10⁵¹ J
    • C) 1.89 × 10⁵⁰ J
    • D) 1.89 × 10⁵² J

    Answer: 1.89 × 10⁵⁰ J

    Explanation: Use E = Δmc² = 0.007 × 2.8 × 10³⁰ × (9 × 10¹⁶). Option A incorrectly omits the 0.7% conversion factor.