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May 27, 2015

Homework Help: physics

Posted by kate on Sunday, April 29, 2012 at 11:50pm.

A uranium nucleus 238U may stay in one piece
for billions of years, but sooner or later it de-
cays into an particle of mass 6.6410−27 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 particle is emitted at a speed of
5 106 m/s, what would be the recoil speed
of the thorium nucleus?
Answer in units of m/s

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