A uranium nucleus 238U may stay in one piece for…


Question Description:

25.50

A uranium nucleus 238U may stay in one piece for billions of years, but sooner or later it de- cays into an α particle of mass 6.64×10−27 kg and 234Th nucleus of mass 3.88 × 10−25 kg, and the decay process itself is extremely fast (it takes about 10−20 s). Suppose the uranium nucleus was at rest just before the decay. If the α particle is emitted at a speed of 1.74×107 m/s, what would be the recoil speed of the thorium nucleus? Answer in units of m/s.

Answer

25.50