Practice question

Given: What is the energy equivalent of a neutron with mass 1.6749 × 10⁻²⁷kg in Joules? (Given c = 3 × 10⁸m/s ) These values define the system as per NCERT data. Formula: E = m c². This is standard NCERT relation. Substitution & Calculation: m = 1.6749 × 10⁻²⁷kg, c² = (3 × 10⁸)² = 9 × 10¹⁶m²/s² . E = 1.6749 × 10⁻²⁷ × 9 × 10¹⁶approx 1.507 × 10⁻¹⁰J . Result: The computed value matches expected outcome and confirms correct choice as per NCERT.