A proton (mass 1 u) is shot toward an unknown target
Chapter 11, Problem 11.103(choose chapter or problem)
A proton (mass 1 u) is shot toward an unknown target nucleus at a speed of 2.50 * 106 m/s. The proton rebounds with its speed reduced by 25% while the target nucleus acquires a speed of 3.12 * 105 m/s. What is the mass, in atomic mass units, of the target nucleus?
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