How much energy is equivalent to a mass of 0.001 kg?
Correct answer D. 25.00 GWh
Explanation
Using E = mc², 0.001 × (3 × 10⁸)² = 9 × 10¹³ J, and dividing by 3.6 × 10¹² J per GWh gives 25 GWh.
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