Answer
$4\times10^{-28}kg $
Work Step by Step
The mass loss is found by using equation 26–7.
$$E=mc^2$$
$$m=\frac{E}{c^2}=\frac{(200MeV)(1.60\times10^{-13}J/MeV)}{(3.00\times10^8m/s)^2}$$
$$=3.56\times10^{-28}kg\approx 4\times10^{-28}kg $$
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