NSTSE (National Science Talent Search Exam- Unified Council) Class 9: Questions 1526 - 1531 of 2000

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Question number: 1526

» Physics » Sound

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MCQ▾

Question

If a body vibrating times in a minute and speed of the sound through this vibrating body in air is , then wavelength of the sound is approximately:

Choices

Choice (4) Response

a.

b.

c.

d.

Question number: 1527

» Biology » Diversity of Living Organisms

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Question

In protozoans the function of contractile vacuole is

Choices

Choice (4) Response

a.

Circulation

b.

Absorption of water

c.

Osmoregulation

d.

Excretion

Question number: 1528

» Physics » Sound

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Question

If a wave of frequency travels in the air with speed of , then the wavelength of the wave is:

Choices

Choice (4) Response

a.

b.

c.

d.

Question number: 1529

» Physics » Sound

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MCQ▾

Question

The time period of a pendulum whose length is is:

Choices

Choice (4) Response

a.

b.

c.

d.

Question number: 1530

» Physics » Work, Energy & Power

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Question

The kinetic energy of Object is same as Object 2. But mass of object 1 is more than that of object 2. If and are the momentum of the object 1 and object 2 respectively, then which of the following is true?

Choices

Choice (4) Response

a.

b.

c.

d.

None of the above

Question number: 1531

» Physics » Sound

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MCQ▾

Question

An object is below sea level. A research vessel sends down a sonar signal to confirm this depth. After how long can it expect to get the echo?

(Take the speed of sound in sea water as . )

Choices

Choice (4) Response

a.

b.

c.

d.

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