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May 6, 2015

Homework Help: physics

Posted by Dorothy on Thursday, February 7, 2008 at 6:07pm.

A single uranium atom has a mass of 3.97 x 10^-25 kg. It decays into the nucleus of a thorium atom by emitting an alpha particle at a speed of 2.10 x 10^7 m/s. The mass of an alpha particle is 6.68 x 10^-27 kg. What is the recoil speed of the thorium nucleus?

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