AP (Advanced Placement) Physics(B-C): Questions 397 - 399 of 921

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Question number: 397

» Periodic Motion, Mechanical Waves & Sound

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MCQ▾

Question

If the sound level in a room increases from decibels to decibels, by what factor has the actual intensity increased?

Choices

Choice (5)Response

a.

10 times

b.

100 times

c.

2 times

d.

6 times

e.

Question does not provide sufficient data or is vague

Question number: 398

» Linear Momentum

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MCQ▾

Question

Which of the following properties are conserved in a totally inelastic collision of two objects, in the absence of external forces on the system of objects?

Choices

Choice (5)Response

a.

Only kinetic energy

b.

Momentum and kinetic energy

c.

Only momentum

d.

Neither momentum nor kinetic energy

e.

All of the above

Question number: 399

» Magnetic Field & Electromagnetism

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MCQ▾

Question

In the illustration, an electron moves into a region with a uniform magnetic field directed out of the page. In what direction would an electric field be added to the magnetic region so that the electron moves in a straight line across the region from left to right?

Electron moves in magnetic field

Electron Moves in Magnetic Field

Choices

Choice (5)Response

a.

The electric field would be directed out of the page.

b.

The electric field would be directed into the page.

c.

The electric field would be directed toward the top of the page.

d.

The electric field would be directed toward the bottom of the page.

e.

None of the above

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