### What is the kinetic energy of the detected proton

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An experimenter bombards a target of 54Cr with alpha particles such as 4He + 54Cr -> p+ 57Mn Suppose the incoming alpha particle has 26MeV kinetic energy in the lab, the Chromium nucleus is stationary and protons are detected at 30 degrees.

a) What is the kinetic energy of the detected proton?

b) What is the angle of emission of 57Mn and its kinetic energy?

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