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March 5, 2015

Homework Help: physics

Posted by Anonymous on Saturday, January 16, 2010 at 4:34pm.

A uranium nucleus 238U may stay in one piece for billions of years, but sooner or later it decays into an a 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 a particle is emitted at a speed of 1.0710^7 m/s, what would be the recoil speed of the thorium nucleus?
Answer in units of m/s.

I got -183113.4021m/s, but that was wrong, and so was 183113.4021m/s

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