NSTSE (National Science Talent Search Exam- Unified Council) Class 9: Questions 1366 - 1370 of 2000

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Question number: 1366

» Physics » Sound

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MCQ▾

Question

The sounds have frequency more than are called:

Choices

Choice (4) Response

a.

Infrasonic

b.

Supersonic

c.

Audible

d.

Ultrasonic

Question number: 1367

» Physics » Motion

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MCQ▾

Question

If two cars travel same distance, and reach at destination at same time. But car – 1 starts before its journey than the car – 2. If the speed of the car – 1 is and speed of the car is , then which of the following is correct?

Choices

Choice (4) Response

a.

b.

c.

d.

All of the above

Question number: 1368

» Physics » Gravitation & Pressure

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MCQ▾

Question

The acceleration of a particle if it is dropped from a height of above the earth’s surface is:

Where is the radius of the earth.

Choices

Choice (4) Response

a.

b.

c.

d.

Question number: 1369

» Physics » Motion

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MCQ▾

Question

A body in uniform acceleration in a straight line has a speed of at position is given by . The acceleration and initial speed of the body are, respectively-

Choices

Choice (4) Response

a.

b.

c.

d.

Question number: 1370

» Physics » Sound

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MCQ▾

Question

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

In figure variations of density at two different instant are shown

The speed of the wave pulse is:

Choices

Choice (4) Response

a.

b.

c.

d.

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