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 is placed in contact with metal rod 2, thermp77i x k2eb8 2*mkhxpmal energy flows from 1 to 22hbpk*i2xm87 p m kex7. 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 njwf 7uti:u lx7 lie2,s+v2jm4eeds to be thawed quickly. Which of the methods described provides the most rapid thawing of the b u2el +7fsl iixw4:jujv7,m2turger?

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 m*yu /nljv0z0 Kelvin scale, by how much does th*/zulj0mnv 0 ye time-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.0 m kwv-.s(e ax58;yzwxcxr e to be investigating “The transfer of energy that results from the bulk motion of a fluid.” Which of the following terms best describes the ener 8xc.-;smyazre x kv(ww .x5e0gy 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 spher;qj6 0gt hl;)t;qhyb zes are 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 energz;t0jh;gb) l6 y ;thqqy 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 f;*i.sl 03m kgewm a.hwater 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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