# NSTSE (National Science Talent Search Exam- Unified Council) Class 9: Questions 1320 - 1325 of 2000

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## Question number: 1320

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MCQ▾

### Question

The sound waves can travel:

### Choices

Choice (4) Response

a.

in medium only, not in vacuum

b.

in vacuum only, not in medium

c.

in vacuum as well as in medium

d.

in medium as well as in vacuum

## Question number: 1321

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MCQ▾

### Question

If the directions of the velocity and acceleration of a bike are opposite, then the bike rider –

### Choices

Choice (4) Response

a.

Doing nothing

b.

Applying breaks for negative acceleration

c.

Keep speed constant.

d.

Applying positive acceleration

## Question number: 1322

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MCQ▾

### Question

If we have taken, a spherical objects to the centre of the earth, then:

### Choices

Choice (4) Response

a.

Its weight becomes zero.

b.

Its weight is unaffected.

c.

Its weight increase as R decrease.

d.

Question does not provide sufficient data or is vague

## Question number: 1323

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MCQ▾

### Question

A child slides down an inclined surface. The speed changes at a constant rate from to in . Then its acceleration is –

### Choices

Choice (4) Response

a.

b.

c.

d.

Cannot determine

## Question number: 1324

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MCQ▾

### Question

In SI system, is the unit of:

### Choices

Choice (4) Response

a.

b.

c.

d.

## Question number: 1325

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MCQ▾

### Question

If two identical bodies of mass , placed apart, then gravitational force between them is:

### Choices

Choice (4) Response

a.

b.

c.

3.33

d.

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