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A neutron makes a head-on elastic collis...

A neutron makes a head-on elastic collision with a stationary deuteron. The fraction energy loss of the neutron in the collision is

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The correct Answer is:
[(a) `eta = 4Mm (m+m)^(2) = 0.89`, (b) `eta = (2m)/((m+M)) = (2)/(3)`]
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