Thermal Transformation: Conduction, Convection and Radiation

1#

96.05: When metal rod 1 is placed in contact with metal rod 2, thermal energy fls8wh9i,yhopeu d2 dl e5e 9(o:ows from 1 to 2. A possible explanation is that 1 has ale,dp89de(sy5 eh2 ou:h 9iow higher ____ than 2

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2#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

06.27: A frozen hamburger in pla y u 4lll0b;f6 (n-mmfvalx0v9stic needs to be thawed quickly. Which of the methods described providesb m;0lf v4l(ymnvx96 u-laf0l 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 material doubles on the Kelvin scale, 0sbex k3i:x wxy)5oz-by how much does the time-rate at which energy is radiated from the materixsxwx- 3)o: k i0ezb5yal change?

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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 be investigating “The transfer of ene.pmh3-nld:lib4kpe c u wc 0,0rgy that results from the bulk motion of a fluid.” Which of the followii -m.bdlk0e: 3cl,w p0h ncu4png terms best describes 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 ow*u zmbj:k7 qb8f-r9 to the same temperature and allowed to radiate energy to identical swr9 z mj*:8-ukq7ofbb urroundings. The spheres have the same emissivity, but one sphere has twice the diameter 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 ofqyk,l e;(y w s6r1pj-f liquid 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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