0.001 kg mass will be equivalent to_________________?
Correct answer: B. 25.00 GWh
- A. 2.50 GWh
- B. 25.00 GWh
- C. 0.26 GWh
- D. 250 GWh
Explanation
Using mass-energy equivalence, E = mc2 = 0.001 kg x (3 x 10^8 m/s)2 = 9 x 10^13 J. Since 1 GWh = 3.6 x 10^12 J, the energy is (9 x 10^13 J)/(3.6 x 10^12 J/GWh) = 25.00 GWh. The likely trap is 0.26 GWh, caused by an incorrect conversion between joules and gigawatt-hours.
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