NSTSE (National Science Talent Search Exam- Unified Council) Class 9: Questions 1338 - 1342 of 2000

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Question number: 1338

» Physics » Sound

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MCQ▾

Question

On which factor intensity of sound depends?

Choices

Choice (4)Response

a.

Amplitude of vibration

b.

Density of the medium

c.

Surface area of the vibrating source

d.

All a. , b. and c. are correct

Question number: 1339

» Physics » Motion

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MCQ▾

Question

If a particle is having linear uniform accelerating motion, then it’s graph of the speed vs time is like –

Choices

Choice (4)Response

a.

Graph of Speed vs Time : Choice A

Graph of Speed vs Time: Choice A

b.

Graph of Speed vs Time : Choice B

Graph of Speed vs Time: Choice B

c.

Graph of Speed vs Time : Choice C

Graph of Speed vs Time: Choice C

d.

Graph of Speed vs Time : Choice D

Graph of Speed vs Time: Choice D

Question number: 1340

» Physics » Gravitation & Pressure

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MCQ▾

Question

When a sphere is partly immersed in a liquid, it seem to be the less weight than its original one. Due to:

Choices

Choice (4)Response

a.

A down-thrust

b.

An up-thrust

c.

Upward or downward thrust depending on the density of the sphere

d.

Upward or downward thrust depending on the density of the liquid

Question number: 1341

» Chemistry » Atoms & Molecules

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MCQ▾

Question

How many moles of oxygen atoms are present in two moles of acetic acid?

Choices

Choice (4)Response

a.

3

b.

1

c.

2

d.

4

Question number: 1342

» Physics » Sound

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MCQ▾

Question

The time period of a periodic wave is . At a particular position there is a crest at . A trough will appear at this position when is equal to:

Choices

Choice (4)Response

a.

b.

c.

d.

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