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Review Constants In proton-beam therapy, a high-energy beam of protons is fired at a tumor. The protons come to rest in the tumor, depositing their kinetic energy and breaking apart the tumor's DNA, thus killing its cells. For one patient, it is desired that a total of 0.15 J of proton energy be deposited in a tumor. To create the proton beam, the protons are accelerated from rest through a 20 MV potential difference. How many protons must be fired at the tumor to deposit the required energy? Express your answer to three significant figures. ► View Available Hint(s) 190 ALOR O ? N- Submit Part What is the total charge of the protons that must be fired at the tumor to deposit the required energy? Express your answer to three significant figures and include the appropriate units. 9= Value Units Submit Request Answer

Review Part A In proton-beam therapy, a high-energy beam of protons is fired at a tumor. The protons come to rest in the tumor, depositing their kinetic energy and breaking apart the tumor's DNA, thus killing its cells. For one patient, it is desired that a total of 0.15 J of proton energy be deposited in a tumor. To create the proton beam, the protons are accelerated from rest through a 20 MV potential difference. How much kinetic energy, in electronvolts, does one proton have after being accelerated? Express your answer to three significant figures. View Available Hint(s) 10 AZN 0 0 ? Submit Part B How many protons must be fired at the tumor to deposit the required energy? Express your answer to three significant figures. View Available Hint(s) 150 ACP R O ? Submit