A gamma scan showing the active volume of a patient's lungs can be created by having a patient breathe the radioactive isotope \({ }^{133} \mathrm{Xe}\), which undergoes beta-minus decay with a subsequent gamma emission from the daughter nucleus. A typical procedure gives a dose of \(0.30 \mathrm{rem}\) to the lungs. How much energy is deposited in the \(1.2 \mathrm{~kg}\) mass of a patient's lungs?

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