# AP (Advanced Placement) Physics(B-C): Questions 634 - 638 of 921

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## Question number: 634

MCQ▾

### Question

If the sound level in a room increases from decibels to decibels, then the intensity of sound increases from to . What is the value of ?

### Choices

Choice (5) Response

a.

2

b.

20

c.

d.

e.

None of the above

## Question number: 635

MCQ▾

### Question

The energy stored in charged capacitor of capacitance , is . What is the potential difference of capacitor?

### Choices

Choice (5) Response

a.

b.

c.

d.

e.

None of the above

## Question number: 636

MCQ▾

### Question

An object of mass of moving north at collides totally inelastically with an object of mass of that is moving west at . What is the result of this collision?

### Choices

Choice (5) Response

a.

A object moves southeast at about .

b.

A object moves south at and a object moves east at .

c.

A object moves southeast at .

d.

A object moves northwest at about .

e.

None of the above

## Question number: 637

MCQ▾

### Question

What is the potential energy of a charge when it is placed at a distance of from another charge?

### Choices

Choice (5) Response

a.

b.

c.

d.

e.

All of the above

## Question number: 638

MCQ▾

### Question

The distance of a bicycle pedal from its axle is about . If a bicycle rider with a mass of exerts all of his weight on the pedal, what is the approximate torque applied at the point where the pedal is farthest forward and horizontal?

### Choices

Choice (5) Response

a.

b.

c.

d.

e.

All of the above