The voltage across the dees of a cyclotron is 30,000 V. How many revolutions do the protons go through in reaching a kinetic energy of 21 MeV? (1 eV = 1.60 × 10-19 J, e = 1.60 × 10-19 C, mproton = 1.67 × 10-27 kg)
A) 2.0 million
B) 1400
C) 700
D) 350
E) 35
Correct Answer:
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