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Problem 46 Hard Difficulty

A 200. - rad dose of radiation is administered to a patient in an effort to combat a cancerous growth. Assuming all the energy deposited is absorbed by the growth, (a) calculate the amount of energy delivered per unit mass. (b) Assuming the growth has a mass of 0.25 kg and a specific heat equal to that of water, calculate its temperature rise.

Answer

a. 2.00 \mathrm{J} / \mathrm{kg}
b. 4.78 \times 10^{-4} C

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Top Physics 103 Educators
Andy C.

University of Michigan - Ann Arbor

Farnaz M.

Other Schools

Zachary M.

Hope College

Jared E.

University of Winnipeg

Video Transcript

for number 46. A 200 red dose of radiation is used to treat a tumor and import A. We want to know how much energy per mass the tour would have received. Well, I mean, the definition of of red would have read is, um it gives telling me to jule her kilogram and were asked how much energy this gets per kilogram. So I just need to take Well, that's 200 times tending to you, too. So that's going to be, um, 2.0 Jules Per Kilogram Import B and wants to know how much the temperature would change of that tumor if it has the same specific heat as water and they give us the mass of it. The masses 0.25 kilograms. So there's a face change, so it's just the heat Is emcee Delta T. Where Q is the energy was given. We know it got to Jules per kilogram, so this will be too times the 0.25 because that's how many kilograms we have. The mass that's again, the 0.25 kilograms. See, it's it's, um, specific heat, and we're supposed to assume it's the same with water. I need to pick the one that is measured in jewels, that my unit's work out. 4186 Jules program degree Celsius and I'm looking for the change in temperature until the master's matter cancels out of this and I get that may change in temperature is really small. 4.78 times 10 to the negative forth degrees Celsius.

University of Virginia
Top Physics 103 Educators
Andy C.

University of Michigan - Ann Arbor

Farnaz M.

Other Schools

Zachary M.

Hope College

Jared E.

University of Winnipeg