# NSTSE (National Science Talent Search Exam- Unified Council) Class 9: Questions 1543 - 1549 of 2000

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## Question number: 1543

Edit
MCQ▾

### Question

A gun is away from a man. If he observed the smoke from a gun before he hears the sound of shooting by same gun, then speed of the sound is:

### Choices

Choice (4)Response

a.

b.

c.

d.

## Question number: 1544

Edit
MCQ▾

### Question

If momentum of a particle becomes times, then kinetic energy of the particle increases by factor:

### Choices

Choice (4)Response

a.

12

b.

6

c.

3

d.

9

## Passage

A train is moving between A and B. The distance – time graph of journey of train is shown as below.

## Question number: 1545 (1 of 3 Based on Passage) Show Passage

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MCQ▾

### Question

The distance travelled by the train in end of 15 min is:

### Choices

Choice (4)Response

a.

b.

c.

d.

Cannot determined

## Question number: 1546 (2 of 3 Based on Passage) Show Passage

Edit
MCQ▾

### Question

After , the speed of train:

### Choices

Choice (4)Response

a.

Remains same

b.

Increases

c.

Becomes zero

d.

Decrease

## Question number: 1547 (3 of 3 Based on Passage) Show Passage

Edit
MCQ▾

### Question

The speed of the train during first is:

### Choices

Choice (4)Response

a.

b.

c.

d.

## Question number: 1548

Edit
MCQ▾

### Question

Two objects are placed apart, then the gravitational force between them is . After some time they are placed apart, then the gravitational force between them is . Find the ratio of these gravitational forces .

### Choices

Choice (4)Response

a.

9

b.

c.

d.

3

## Question number: 1549

Edit
MCQ▾

### Question

A speed of a sound is and its wavelength is . Then sound is:

### Choices

Choice (4)Response

a.

Ultrasonic

b.

Infrasonic

c.

Audible

d.

None of the above

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