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

In figure graph of speed vs time is shown.

b.

Graph of Speed vs Time : Choice B

Graph of Speed vs Time: Choice B

In figure graph of speed vs time is shown.

c.

Graph of Speed vs Time : Choice C

Graph of Speed vs Time: Choice C

In figure graph of speed vs time is shown.

d.

Graph of Speed vs Time : Choice D

Graph of Speed vs Time: Choice D

In figure graph of speed vs time is shown.

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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