NSTSE (National Science Talent Search Exam- Unified Council) Class 9: Questions 1450 - 1457 of 2000

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Question number: 1450

» Physics » Sound

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MCQ▾

Question

Which of the following is frequency of an ultrasonic wave?

Choices

Choice (4) Response

a.

b.

c.

d.

Question number: 1451

» Physics » Sound

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MCQ▾

Question

If a submarine sends out a signal and receives an echo in by a sonar device, then calculate the speed of sound in water if the distance of the submarine is .

Choices

Choice (4) Response

a.

b.

c.

d.

Question number: 1452

» Physics » Gravitation & Pressure

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Question

A body is of weights on the surface of the earth. What is the gravitational force on it due to the earth at a height equal to of radius of the earth?

Choices

Choice (4) Response

a.

b.

c.

d.

Passage

A boy is taking a ride on bicycle. But the road is not so well to go with uniform speed or with uniform acceleration. The graph of distance – time of boy’s journey is shown in following graph.

Time graph of a boy

Time Graph of a Boy

In figure distance – time graph of a boy, which is riding a bicycle, is shown.

Question number: 1453 (1 of 3 Based on Passage) Show Passage

» Physics » Motion

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Question

How many times did boy take rest?

Choices

Choice (4) Response

a.

0

b.

3

c.

d.

Question number: 1454 (2 of 3 Based on Passage) Show Passage

» Physics » Motion

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Question

The total distance travelled by the boy is:

Choices

Choice (4) Response

a.

b.

c.

d.

All of the above

Question number: 1455 (3 of 3 Based on Passage) Show Passage

» Physics » Motion

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Question

The average speed of the boy is:

Choices

Choice (4) Response

a.

b.

c.

d.

Question number: 1456

» Biology » Diversity of Living Organisms

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MCQ▾

Question

Which of the followings helps in the entry of water into sponge body?

Choices

Choice (4) Response

a.

Osculum

b.

Ostia

c.

Spongocoel

d.

Radial canals

Question number: 1457

» Physics » Sound

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MCQ▾

Question

A frequency of a sound wave is and a wave length is . Time taken by this sound to travel is:

Choices

Choice (4) Response

a.

b.

c.

d.

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