AP (Advanced Placement) Physics(B-C): Questions 417 - 419 of 920

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Question number: 417

» Work, Energy and Power

MCQ▾

Question

What is the work done in placing a satellite of mass in orbit at a distance from Earth’s center?

Choices

Choice (5) Response

a.

The work is equal to the gravitational potential energy of the satellite at that altitude above Earth’s surface.

b.

The work is equal to the change in gravitational potential energy of the satellite from the surface to that altitude plus the change in kinetic energy of the satellite.

c.

The work is equal to the weight of the satellite plus the kinetic energy of the satellite.

d.

The work is equal to the gravitational potential energy of the satellite plus the centripetal force necessary to keep the satellite in orbit at that altitude.

e.

All of the above

Question number: 418

» Thermodynamics

MCQ▾

Question

How much heat must be added or removed to allow 2 moles of an ideal gas to expand isothermally from to ?

Choices

Choice (5) Response

a.

An amount equal to the product of pressure and volume must be added.

b.

No heat must be added or removed: .

c.

An amount equal to the work done by the gas must be added.

d.

An amount equal to the work done by the gas must be removed.

e.

None of the above

Question number: 419

» Thermodynamics

MCQ▾

Question

According to the first law of thermodynamics (the law of conservation of energy for thermodynamic systems), an increase in the temperature of a system during an adiabatic process is due to:

Choices

Choice (5) Response

a.

Heat added to the system to increase the temperature of molecules

b.

Work done by the molecules of the system in expanding themselves

c.

Work done by an external force on the system, increasing the kinetic energy of molecules

d.

Heat transferred from one part of the system to another

e.

Question does not provide sufficient data or is vague

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