Thermal Transformation: Conduction, Convection and Radiation

1#

96.05: When metal rod 1 is placed mkq *w3/wj t3w,9xucgin contact with metal rod 2, thermal energy flows frxgwj3 uwqk t9*/3,cmw om 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 plastok0)b:c jsm0 sic needs to be thawed quickly. Which of the methodsc0:m skjos0 )b described provides 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 matey2mdcf)if ,o(rial doubles on the Kelvin scale, by how much does the time-rate at which efi y)oc,2 mdf(nergy 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 ofok rnajfe 16p7oh2dws 45 eg9; energy that results from the bulk n7 4e o61h5eg2pjos;9ardwfk motion of a fluid.” 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 a rlgvcqi6 b2-r2-qr dex;*o y)re 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 othe-oqcry-*gibv6q2er r )x l2;dr. 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 gramsv0cl m(wo1.jnew4 ;tk of 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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