NSTSE (National Science Talent Search Exam- Unified Council) Class 9: Questions 1433 - 1439 of 2000

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Question number: 1433

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MCQ▾

Question

Which of the following mammals lay eggs?

Choices

Choice (4)Response

a.

Marsupials

b.

Placentals

c.

Monotremes

d.

Fish

Question number: 1434

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MCQ▾

Question

The acceleration due to gravity at the depth from the surface of the earth is:

The radius of earth is about .

Choices

Choice (4)Response

a.

b.

c.

d.

Question number: 1435

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MCQ▾

Question

A boy kicked a stone with force but he got hurt. Because of which of the following properties of the stone did it happen?

Choices

Choice (4)Response

a.

Momentum

b.

Velocity

c.

Inertia

d.

Reaction

Question number: 1436

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MCQ▾

Question

A block of mass slides down a rough inclined plane of inclination starting from its top. If the coefficient of kinetic friction is and the length of the plane is , the work done against friction is:

Choices

Choice (4)Response

a.

b.

c.

and 0 N

d.

Question number: 1437

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MCQ▾

Question

If a wave source produces crests and troughs in , then its frequency of the wave is:

Choices

Choice (4)Response

a.

b.

c.

d.

None of the above

Question number: 1438

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MCQ▾

Question

If amplitude of the sound wave increases, then loudness:

Choices

Choice (4)Response

a.

Becomes zero

b.

Increases

c.

Decreases

d.

Remains same

Question number: 1439

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MCQ▾

Question

Points and are in a vertical line such that . A ball at the top most point is allowed to fall freely. What is the ratio of the times of descent through and ?

Choices

Choice (4)Response

a.

b.

c.

d.

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