NSO Level 1- Science Olympiad (SOF) Class 8: Questions 904 - 912 of 1076

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Question number: 904

» Sound

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MCQ▾

Question

The astronauts in space use special devices to talk with each other. The reason is

Choices

Choice (4) Response

a.

Space is vacuum

b.

Sound do not propagate through vacuum

c.

Both a. and b. are correct

d.

None of the above

Question number: 905

» Sound

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MCQ▾

Question

Human ear can hear the sound with frequency between

Choices

Choice (4) Response

a.

20Hz to 2000 Hz

b.

20Hz to 20000 Hz

c.

15Hz to 15000Hz

d.

10Hz to 10000 Hz

Question number: 906

» Sound

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MCQ▾

Question

The sound with frequency above is known as

Choices

Choice (4) Response

a.

Ultra sound

b.

Infra sound

c.

Audible sound

d.

None of the above

Question number: 907

» Sound

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MCQ▾

Question

Maximum displacement of the wave from its mean position is called

Choices

Choice (4) Response

a.

Amplitude

b.

Wavelength

c.

Frequency

d.

Crest

Question number: 908

» Sound

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MCQ▾

Question

The speed of sound in air is

Choices

Choice (4) Response

a.

b.

c.

d.

Question number: 909

» Sound

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MCQ▾

Question

Sound is propagated through

Choices

Choice (4) Response

a.

Liquid

b.

Medium

c.

Vacuum

d.

Solid

Question number: 910

» Sound

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MCQ▾

Question

Which of the following is not a string instrument?

Choices

Choice (4) Response

a.

Veena

b.

Tabala

c.

Guitar

d.

Violin

Question number: 911

» Sound

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MCQ▾

Question

The propagation of sound is maximum in this medium

Choices

Choice (4) Response

a.

Solid

b.

Liquid

c.

Vacuum

d.

Gas

Question number: 912

» Sound

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MCQ▾

Question

The difference between music and noise is

Choices

Choice (4) Response

a.

Music is pleasant to hear but noise is unpleasant

b.

Music is produced by the regular or rhythmic vibrations but noise is produced by irregular vibrations

c.

Music improves mental health while noise cause health problems

d.

All a. , b. and c. are correct

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