An α− particle of mass m suffers one-dimensional elastic collision – InterviewSolution

1.	An α− particle of mass m suffers one-dimensional elastic collision with a nucleus at rest of unknown mass. It is scattered directly backwards losing 64 % of its initial kinetic energy. The mass of the nucleus is
Answer» An $α -$ particle of mass $m$ suffers one-dimensional elastic collision with a nucleus at rest of unknown mass. It is scattered directly backwards losing $64 %$ of its initial kinetic energy. The mass of the nucleus is

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