In the lab, a relativistic proton has a momentum of 1.00 × 10-19 kg ? m/s and a rest energy of 0.150 nJ. What is the speed of the proton in the lab? (c = 3.00 × 108 m/s, mproton = 1.67 × 10-27 kg)
A) 0.170c
B) 0.196c
C) 0.911c
D) 0.930c
E) 0.951c
Answer: B
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