Thermal Transformation: Conduction, Convection and Radiation

1#

96.05: When metal rod 1 is placed ipa j2 6hvj+82p/u +87gbd v- txmrjyhmn contact with metal rod 2, thermal energy flows from 1 to 2. A possible explanation is that 1rvyp 8pd/86 tu7j 2m++jgxmj bv-hah 2 has a higher ____ than 2

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2#

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06.27: A frozen hamburger in plastic needs to be thawed quickly. Which of tplz q1:g v1k *hx3pk/*k: s* bbn*pod1k:wzxehe methods desevkl1n*hxz bp1bd 3*xkqzwkk:*gop:*1 :ps/ cribed provides the most rapid thawing of the burger?

A. Place the burger itself in a metal pan at room temperature.

B. Place the burger in its package on the kitchen counter at room temperature.

C. Place the burger in its package in a pot of non-boiling warm water.

D. Place the burger itself on a plastic plate in the refrigerator.

E. Place the burger itself on the ceramic kitchen counter at room temperature.

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3#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

07.45: If the temperature of a mater .wj8oyf*6qv dial doubles on the Kelvin scale, by how much does the time-rate at which energy is radiated from the material fy6 .8wjq*vodchange?

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4#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

09.19: A scientist claims to b4vfcg;9ju m ro16j b3s5oldza;k o;l8e investigating “The transfer of energy that results from the bulk motion of a fluid.” Which of the following terms best describe95kuso; m 3ol ;8l46 o;cabjdjgf1vrzs the energy transfer method that this scientist is studying?

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5#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

10.41/18.50: Two spheres are heated to the same temperature andx tkw+u ,h4i 1c(gn bej+qv2k: allowed to radiate energy to identical surroundings. The spheres have the same emissivity, but one sphere has twice the diametk wt2ch ev:bk i,x41+ugqj(n+er of the other. If the smaller sphere radiates energy at a rate P, at what rate will the larger sphere radiate energy?

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6#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

08.22: In a calorimeter, 20 grams of liquid3ox 5menkp5k5r4)+ at w5s2y l, yfmaw water at $100^{\circ}C$ is mixed with 50 grams of water vapor at $100^{\circ}C$. The system is allowed to come to equilibrium. Assuming that the calorimeter and the surroundings can be ignored, which of the following best describes the net energy exchange between the vapor and the liquid during the process of coming to equilibrium?

A. There is no net energy exchange.

B. Energy is transferred from the vapor to the liquid, vaporizing some of the liquid

C. Energy is transferred from the vapor to the liquid, increasing the liquid’s temperature.

D. Energy is transferred from the vapor to the liquid until all of the liquid vaporizes.

E. Energy is transferred from the liquid to the vapor, condensing some vapor

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