NSTSE (National Science Talent Search Exam- Unified Council) Class 9: Questions 1396 - 1401 of 2000

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Question number: 1396

» Physics » Work, Energy & Power

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Question

A stationary particle explodes into two particles of masses and which move in opposite directions with velocities and . The ratio of their kinetic energy is:

Choices

Choice (4) Response

a.

b.

c.

d.

Question number: 1397

» Physics » Motion

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Question

An object freely fall from height reaches the ground in time . What is the height at time ?

Choices

Choice (4) Response

a.

b.

c.

d.

Question number: 1398

» Physics » Sound

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Question

Where air pressure is higher, which type of pulses formed?

Choices

Choice (4) Response

a.

Transverse

b.

Rarefaction

c.

Compression

d.

Question does not provide sufficient data or is vague

Question number: 1399

» Physics » Motion

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Question

A particle covers equal distances in equal time interval. It means that –

Choices

Choice (4) Response

a.

Particle moving with constant acceleration

b.

The displacement of the particle is zero

c.

Time taken by a particle for any distance will be same

d.

Particle moving with constant speed

Question number: 1400

» Physics » Work, Energy & Power

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MCQ▾

Question

If a person does work in and another person does of work in , then the ratio of power delivered by to that by is:

Choices

Choice (4) Response

a.

b.

c.

d.

Question number: 1401

» Physics » Sound

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MCQ▾

Question

If sound moves from liquid to solid state, then speed of sound:

Choices

Choice (4) Response

a.

Decreases

b.

Remains same

c.

May b increases or decreases

d.

Increases

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