Thermal Transformation: Conduction, Convection and Radiation - 无忧得胜-网上国际课程 (5edu.win)

1#

96.05: When metal rod 1 ih:wni ;wfp.g rjj4sbe.c7:w*s placed in contact with metal rod 2, thermal energy flows from 1 to 2. A possible explanation is that 1 has a higher ____ ti.rnws :.jj:ep * hwbf4wgc 7;han 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 plastic needs to be thawed quickly. Wfm8wk6 f2m zo 5lltr,9hich of the methods described provides the most rapid th5flmrfk w9lm6 zo8,t2 awing 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 Kelvinvo 9 v2e,gcccqzerqbp-*i 3a 0:r;s s7 scale, by how much does the ti3,bo; evpccq2s es:9-i*z7 ag crv 0rqme-rate at which energy is radiated from the material 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 .:d uzf6bo,stuxfiti-* -g 4v2/nibt of energy that results from the bulk motion of a fluid., tz- u:s6tif/iovdb2 -x*ugbnit. f4” Which of the following 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 to the same temperature and allowr ry,*t4lqe(jz-lg1p d0jl o 4ed to radiate energy qjz*lptgeljdy,r 4l4 r0o(1-to identical surroundings. 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 of liquid water a0:t .ny2lvrmlw*:pgqfk xj8 5t $100^{\circ}C$ 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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