Part A In proton beam therapy, a beam of high-energy protons is used to kill cancerous cells in a tumor. In one system, the beam, which consists of protons with an energy of 2.8 × 10¬11 J, has a current of 84 nA. The protons in the beam mostly come to rest within the tumor. The radiologist has ordered a total dose corresponding to 3.4 × 10-3 J of energy to be deposited in the tumor. How many protons strike the tumor each second? Express your answer as a number of protons. N = 5.3×1011 protons Submit Previous Answers v Correct Part B How long should the beam be on in order to deliver the required dose? Express your answer with the appropriate units. µA ? At = 40476 S Submit Previous Answers Request Answer X Incorrect; Try Again; 2 attempts remaining

Part A In proton beam therapy, a beam of high-energy protons is used to kill cancerous cells in a tumor. In one system, the beam, which consists of protons with an energy of 2.8 × 10¬11 J, has a current of 84 nA. The protons in the beam mostly come to rest within the tumor. The radiologist has ordered a total dose corresponding to 3.4 × 10-3 J of energy to be deposited in the tumor. How many protons strike the tumor each second? Express your answer as a number of protons. N = 5.3×1011 protons Submit Previous Answers v Correct Part B How long should the beam be on in order to deliver the required dose? Express your answer with the appropriate units. µA ? At = 40476 S Submit Previous Answers Request Answer X Incorrect; Try Again; 2 attempts remaining

College Physics

1st Edition

ISBN:9781938168000

Author:Paul Peter Urone, Roger Hinrichs

Publisher:Paul Peter Urone, Roger Hinrichs

Chapter20: Electric Current, Resistance, And Ohm's Law

Section: Chapter Questions

Problem 60PE: Integrated Concepts (a) What energy is dissipated by a lightning bolt having a 20,000-A current, a...

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