AP (Advanced Placement) Physics(B-C): Questions 287 - 289 of 921

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Question number: 287

» Thermodynamics

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MCQ▾

Question

Which of the following methods of energy transfer is due to the motion of fluids of varying densities?

Choices

Choice (5)Response

a.

Convection

b.

Insulation

c.

Radiation

d.

Conduction

e.

None of the above

Question number: 288

» Work, Energy and Power

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MCQ▾

Question

A block with a mass of is moving at a speed of when it slides horizontally off a roof that is above the ground. The kinetic energy of the block just before it hits the ground is approximately:

Choices

Choice (5)Response

a.

b.

c.

d.

e.

All of the above

Question number: 289

» Magnetic Field & Electromagnetism

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MCQ▾

Question

In the illustration, a cathode ray tube is set up between the magnetic poles of a horseshoe magnet. The tube shoots electrons from left to right between the poles. Which of the following statements describes the path of the beam of electrons?

A cathode ray tube set up between magnetic poles

A Cathode Ray Tube Set up between Magnetic Poles

Choices

Choice (5)Response

a.

The electrons will maintain a straight path at constant speed through the region between the poles.

b.

The electrons will curve upward toward the North Pole as they reach the region between the poles.

c.

The electrons will not move closer to either pole but will curve toward the open end of the magnet and away from the magnet.

d.

The electrons will curve downward toward the South Pole as they reach the region between the poles.

e.

None of the above

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