# AP (Advanced Placement) Physics(B-C): Questions 746 - 750 of 920

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## Question number: 746

MCQ▾

### Question

As a wave passes through an opening that is approximately equal to its wavelength, the wave will bend or change direction, leading to interference of waves from each side of the opening. This is a demonstration of:

### Choices

Choice (5) Response

a.

Reflection

b.

Dispersion

c.

Diffraction

d.

Refraction

e.

None of the above

## Question number: 747

MCQ▾

### Question

A bird is flying north with an airspeed of when it meets a crosswind of toward the west. Which of the following is the resultant speed of the bird?

### Choices

Choice (5) Response

a.

b.

c.

d.

e.

None of the above

## Question number: 748

MCQ▾

### Question

An average force of is exerted on a box to accelerate it from a speed of to in a time interval of . Determine the average power generated.

### Choices

Choice (5) Response

a.

b.

c.

d.

e.

All of the above

## Question number: 749

MCQ▾

### Question

One end of a string is fixed, and other end has over a pulley and has a block attached to other end. The linear mass density of the string is . If the speed of a transverse pulse on the string is , then what is the mass of the block?

### Choices

Choice (5) Response

a.

b.

c.

d.

e.

Question does not provide sufficient data or is vague

## Question number: 750

MCQ▾

### Question

A heat flow through a metal door of dimension thick is . Inside temperature of room is and outside temperature of room is . What is the thermal conductivity of the door?

### Choices

Choice (5) Response

a.

b.

c.

d.

e.

None of the above

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