KillGorack / Physics 2010 / A uranium nucleus (mass 238 units) at rest decays into a helium nucleus (mass 4.0 units) and a thorium nucleus (mass 234 units). If the speed of the helium nucleus is 6.0*10^5 m/s, what is the speed of the thorium nucleus?

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Question A uranium nucleus (mass 238 units) at rest decays into a helium nucleus (mass 4.0 units) and a thorium nucleus (mass 234 units). If the speed of the helium nucleus is 6.0*10^5 m/s, what is the speed of the thorium nucleus?
Answer 1.0*10^4 m/s

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