Thermodynamics (AP (Advanced Placement) Physics(B-C)): Questions 1 - 3 of 57

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Question number: 1

» Thermodynamics

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MCQ▾

Question

The rate at which heat flows by conduction from a hot chamber to a cold chamber through a steel rod may be increased by:

Choices

Choice (5) Response

a.

Substituting a shorter steel rod of the same diameter

b.

Substituting a thinner steel rod of the same length

c.

Decreasing the temperature of the hot chamber and increasing the temperature of the cold chamber

d.

Substituting a rod with the same dimensions but made of a material with higher specific heat

e.

All of the above

Question number: 2

» Thermodynamics

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MCQ▾

Question

The pressure volume graph describes a thermodynamic process for an ideal gas in which step BC is isothermal. The term adiabatic describes a process in which no heat is transferred into or out of a system. Which of the steps in the process could be adiabatic?

PV diagram of a thermodynamic process

PV Diagram of a Thermodynamic Process

In figure PV diagram of a thermodynamic process is shown.

Choices

Choice (5) Response

a.

BC, because temperature remains constant

b.

CA, because there is no pressure change and thus no work is done on or by the gas

c.

AB, because no work is done on or by the gas

d.

None of the above

e.

All of the above

Question number: 3

» Thermodynamics

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MCQ▾

Question

A hot liquid can be cooled more quickly by stirring it with a silver stick. Which of the following actions would be even more effective in cooling the liquid?

Choices

Choice (5) Response

a.

Replace the stick with one twice as long and twice the diameter.

b.

Replace the stick with one-half as long and twice the diameter.

c.

Replace the stick with one twice as long and half the diameter.

d.

Replace the stick with one-half as long and half the diameter.

e.

Question does not provide sufficient data or is vague