Thermal Transformation: Conduction, Convection and Radiation

1#

96.05: When metal rod 1 is placn rz6qo4xc7; jed in contact with metal rod 2, thermal energy flows from 1 to 2. A possible explanation is that 1 hasxr;z4o7 c nj6q 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 1eth5xn)xt n 0p01q oqplastic needs to be thawed quickly. Which of the methods described provides the most rx1pqhx)qtn 0oe 05t 1napid 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 tempera)rg/o 9ef,/wwkm v9yx ture of a material doubles on the Kelvin scale, by how much does the time-rate at which energy is rad9f/ 9 ,vkg)wyemo/ wrxiated from the material change?

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4#

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09.19: A scientist claims to be investigating “The transfe)7pq77lq uyvpqx 0p i*r of energy that results from the bulk motion of a fluid.” Which of the following terms best describes the energyqx yq)pi7 0v*7pqlu7 p 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 andy b/w)a ;/ce qhr; fu+b*e(fhm 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 at a rate P, at what rate will the l+cw;q *ru e/(mab) hffyh ;e/barger 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 liqui ,ugnj. icm/ y26hxuoc q3k:u,d 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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