In proton beam therapy, a beam of high-energy protons is used to deliver radiation to a tumor,
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Question:
In proton beam therapy, a beam of high-energy protons is used to deliver radiation to a tumor, killing its cancerous cells. In one session, the radiologist calls for a dose of 4.510^8 protons to be delivered at a beam current of 120 nA. How long should the beam be turned on to deliver this dose?
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