AP (Advanced Placement) Physics(B-C): Questions 255 - 257 of 921

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Question number: 255

» Work, Energy and Power

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MCQ▾

Question

A ball with a mass of is thrown horizontally at a speed of from the top of a platform that is high. What is the speed of the ball when it hits the ground?

Choices

Choice (5)Response

a.

b.

c.

d.

e.

None of the above

Question number: 256

» Magnetic Field & Electromagnetism

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MCQ▾

Question

A coil of wire with turns has a radius of and a current of . Which of the following actions will increase the strength of the magnetic field inside the coil?

Choices

Choice (5)Response

a.

Reduce the current in the coil.

b.

Reduce the number of turns of wire in the coil.

c.

Insert an iron rod into the middle of the coil.

d.

Question does not provide sufficient data or is vague

e.

None of the above

Question number: 257

» Thermodynamics

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MCQ▾

Question

An engine receives from a heat reservoir at and rejects to the cold reservoir at . Determine the actual efficiency and the theoretical maximum Carnot efficiency for this engine.

Choices

Choice (5)Response

a.

Actual efficiency and Carnot efficiency

Actual

Carnot

b.

Actual efficiency and Carnot efficiency

Actual

Carnot

c.

Actual efficiency and Carnot efficiency

Actual

Carnot

d.

Actual efficiency and Carnot efficiency

Actual

Carnot

e.

Question does not provide sufficient data or is vague

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