# AIIMS (All India Institute of Medical Sciences) Physics: Questions 353 - 357 of 500

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## Question number: 353

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MCQ▾

### Question

The velocity of sound in air at is . At what temperature its velocity will be half?

### Choices

Choice (4)Response

a.

b.

c.

d.

## Question number: 354

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MCQ▾

### Question

A vehicle, with a horn of frequency is moving with a velocity of in a direction perpendicular to the straight line joining the observer and the vehicle. The observer perceives the sound to have a frequency . Then – (Take velocity of sound in air 300 m/s)

### Choices

Choice (4)Response

a.

b.

c.

d.

## Question number: 355

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MCQ▾

### Question

A siren emitting sound of frequency 750 Hz is going away form a static listener with a speed of . The frequency of sound to be heard directly from the siren is –

### Choices

Choice (4)Response

a.

530 Hz

b.

669 Hz

c.

489 Hz

d.

344 Hz

## Question number: 356

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MCQ▾

### Question

A boat at anchor is rocked by waves whose crests are 130m apart and velocity is . The boat bounces up once in every –

### Choices

Choice (4)Response

a.

10 s

b.

100 s

c.

5 s

d.

13 s

## Question number: 357

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MCQ▾

### Question

A body rests on a horizontal rough surface. The coefficient of friction between the body and the surface is . The body is given a velocity of . What is the distance covered by the body before coming to rest?

### Choices

Choice (4)Response

a.

132.5 m

b.

100 m

c.

112.5 m

d.

120.6 m

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