In-Class QuestionsNov 20 2014Enter Ch 33 Ch on your clickersResponseWare Session ID: WHITEHEADIf a biological sample receives a dose of 100 rad from neutrons (RBE=5), what dosage of protons (RBE=10) would cause the same amount of damage to the sample?A. 5 radB. 50 radC. 100 radD. 200 radE. 400 radA. B. C. D. E.20%20%20%20%20%:60What weighs more, an electron and a proton, or a hydrogen atom?A. Electron + protonB. Hydrogen atomC. They weigh the sameA. B. C.33%33%33%:45What weighs more, a proton + 2 neutrons, or a Tritium nucleus (3H)?A. Proton + 2 neutronsB. Tritium nucleusC. They weigh the sameA. B. C.33%33%33%:45In a fission reaction, how does the total mass of the fission fragments compare to the mass of the original nucleus?A. Fission fragments have more massB. Fission fragments have less massC. Fission fragments have the same massA. B. C.33%33%33%:45You may notice that if a mercury-in-glass thermometer is inserted into a hot liquid, the mercury column first drops, and then later starts to rise (as you expect). Why?A. The mercury contracts before the glass contracts.B. The glass contracts before the mercury contracts.C. The mercury contracts before the glass expands.D. The glass expands before the mercury expands.E. The mercury expands before the glass expands.A. B. C. D. E.20%20%20%20%20%:60Two objects are made of the same material, but have different masses and temperatures. If the objects are brought into thermal contact, which one will have the greater temperature change?A. The one with the higher initial temperatureB. The one with the lower initial temperatureC. The one with the greater massD. The one with the smaller massE. The one with the higher specific heatA. B. C. D. E.20%20%20%20%20%:60Why does a metal doorknob feel colder to your hand than the wooden door?A. Metal has a greater thermal conductivity than wood.B. Metal has a smaller thermal conductivity than wood.C. Metal is always at a lower temperature than wood.A. B.
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