Physics [NSTSE (National Science Talent Search Exam- Unified Council) Class 9]: Questions 92 - 98 of 285

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Question number: 92

Physics
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Question

MCQ▾

A wave pulse movies through air causes change in the density of the air. The variations of density at two different instants are shown in the figure given below. The figure (a) corresponds to and figure (b) to .

Variations of density at two different instant

Variations of Density at Two Different Instant

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The speed of the wave pulse is:

Choices

Choice (4)Response

a.

b.

c.

d.

Question number: 93

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Question

MCQ▾

A force of acts on a body of mass . The body covers in seconds moving along a straight line. The initial velocity is:

Choices

Choice (4)Response

a.

b.

c.

d.

Question number: 94

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Question

MCQ▾

If the earth were to expand slightly without any change of mass, then the acceleration due to gravity is:

Choices

Choice (4)Response

a.

Remains same

b.

Decrease

c.

Increase

d.

None of the above

Passage

A scooter traveled . The velocity – time graphs is shown below,

Velocity – Time of scooter

Velocity – Time of Scooter

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Question number: 95 (1 of 3 Based on Passage) Show Passage

Physics
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Question

MCQ▾

The acceleration in first is:

Choices

Choice (4)Response

a.

b.

0

c.

d.

Question number: 96 (2 of 3 Based on Passage) Show Passage

Physics
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Question

MCQ▾

Distance covered by the scooter between time to is:

Choices

Choice (4)Response

a.

b.

c.

d.

Question number: 97 (3 of 3 Based on Passage) Show Passage

Physics
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Question

MCQ▾

The magnitude of retardation after of scooter is:

Choices

Choice (4)Response

a.

b.

c.

d.

Question number: 98

Physics
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Question

MCQ▾

A man shot a bullet with a speed of which just penetrates a plank of wood. With what speed should he shoot a bullet to pass through similar planks?

Choices

Choice (4)Response

a.

b.

c.

d.