1 a beam of 168-mev nitrogen nuclei is used for cancer, Ask an Expert

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1. A beam of 168-MeV nitrogen nuclei is used for cancer therapy. If this beam is directed onto a 0.200-kg tumor and gives it a 2.00-Sv dose, how many nitrogen nuclei were stopped? (Use an RBE of 20 for heavy ions.)

2. Find the mass of ²³⁹ Pu that has an activity of 1.00 µCi.

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