NSTSE (National Science Talent Search Exam- Unified Council) Class 9: Questions 1458 - 1462 of 2000

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Question number: 1458

» Physics » Sound

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Question

The time period of a simple pendulum is . If the length of the pendulum is three times, the new time period will be:

Choices

Choice (4) Response

a.

b.

c.

d.

Question number: 1459

» Physics » Sound

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Question

A longitudinal wave consists of:

Choices

Choice (4) Response

a.

a number of rarefaction pulses one after the other

b.

a compression and a rarefaction pulse separated by a distance equal to one wavelength

c.

a number of compression pulses one after the other

d.

compression and rarefaction pulses one after the other

Question number: 1460

» Physics » Motion

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Question

From a top of a tower of height , a boy projects a ball vertically upwards with an initial velocity of such that it eventually falls to the ground. At what time will the ball reach the ground?

Choices

Choice (4) Response

a.

b.

c.

d.

Question number: 1461

» Physics » Motion

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Question

A ball is thrown vertically upwards with an initial velocity of . The time taken by the ball to strike the ground is –

(Acceleration due to gravity is )

Choices

Choice (4) Response

a.

b.

c.

d.

Question number: 1462

» Physics » Force & Laws of Motion

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Question

Two bodies of masses and are moving along the same line and direction with velocity of and , respectively. They collide and after the collision, the first body moves at a velocity of . Determine the velocity of the second body.

Choices

Choice (4) Response

a.

b.

c.

d.

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