A proton's rest mass is 1.67 × 10?27 kg. Calculate its kinetic energy when it is accelerated to a speed of 0.80c.
A. 1.0 × 10?10 J
B. 1.5 × 10?10 J
C. ?2.0 × 10?10 J
D. 2.5 × 10?10 J
E. 7.5 × 10?10 J
Answer: A
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