Physics [NSTSE (National Science Talent Search Exam- Unified Council) Class 9]: Questions 114 - 119 of 285

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Question 114

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Question

MCQ▾

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 115

Physics
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Question

MCQ▾

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 116

Physics
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Question

MCQ▾

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 117

Physics
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Question

MCQ▾

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 118

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Question

MCQ▾

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 119

Physics
Edit

Question

MCQ▾

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