Thermal Transformation: Conduction, Convection and Radiation

1#

96.05: When metal rod 1 is placed in contact with metal rod c n /j*-)ylp 84leir6 didocd(2, thermal energy fl6cjc* -e(i/4l 8dliorny)d dpows from 1 to 2. A possible explanation is that 1 has a 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 plastic needs to be thawed quickly. Which of bjl:6 zzy,ee; the methods described proz;6,ez:j blye vides 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 doubles8 -,;sxyou x+,zyl xgd on the Kelvin scale, by how much does the time-rate at whu lxs8x-gy;+o ,,xdzy ich 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 investigatingbdng orm7;ow od+blu h72x7dc g1;,* rt s-3xg “The transfer of energy that results from the bulk motion of a fluid.” Which of the following terms best describes the energy transfer method that od*t r;gc on2 u;,bsh7 w ld+g3gmrb1d7 7xo-xthis scientist is studying?

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5#

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10.41/18.50: Two spheres are1kn+ *owaqhm * heated to the same temperature and allowed to radiate energy 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 *a o+m*nkw1 hqat 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 lig 2(qrljp0,m wquid 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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