A uranium-238 nucleus undergoes a radioactive decay, 238 U 234Th + 4He. The masses are approximately 238, 234 and 4 u, where u = the atomic mass unit. The U nucleus is initially at rest. Suppose the He nucleus has speed v. Then what is the kinetic energy of the Th nucleus? Parameters: u = 1.66 x 10-27 kg; v = 9.000×106 m/s. (in J)
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