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Asked in GSEB Board July 2021 · Mass defect and binding energy
Given: m=1 g=10⁻³ kg and c=3×10⁸ m s⁻¹.
Idea: E=mc², with the mass converted to kilograms first.
c²=(3×10⁸)²=9×10¹⁶ m² s⁻².
E=10⁻³×9×10¹⁶=9×10¹³ J.
Every option here begins with 9, so the whole question is about the power of ten: count it carefully.
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