NSO Level 1- Science Olympiad (SOF) Class 8: Questions 858 - 864 of 1076

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Question number: 858

» Friction

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MCQ▾

Question

We use a towel to open a tight bottle cap. This is because

Choices

Choice (4) Response

a.

It provides better grip and makes the work easier

b.

Rough surface of towel helps in increasing friction

c.

Both a. and b. are correct

d.

None of the above

Question number: 859

» Sound

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MCQ▾

Question

Women and children have sweet voice while men have a rough voice. The reason is

Choices

Choice (4) Response

a.

The vocal cord of men, women and children are equal in size

b.

The vocal cord of a woman or a child is larger than a man

c.

The vocal cord of a man is larger than that of a woman and a child

d.

Question does not provide sufficient data or is vague

Question number: 860

» Sound

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MCQ▾

Question

The size of vocal cord of a common man is

Choices

Choice (4) Response

a.

b.

c.

d.

Question number: 861

» Sound

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MCQ▾

Question

An unpleasant sound which disturbs us is called a

Choices

Choice (4) Response

a.

Music

b.

Alarm

c.

Noise

d.

Question does not provide sufficient data or is vague

Question number: 862

» Sound

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MCQ▾

Question

Children under the age of can hear sounds with frequency up to

Choices

Choice (4) Response

a.

25 KHz

b.

20000 Hz

c.

20Hz

d.

20 KHz

Question number: 863

» Sound

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MCQ▾

Question

Sound is a form of

Choices

Choice (4) Response

a.

Work

b.

Energy

c.

Force

d.

Question does not provide sufficient data or is vague

Question number: 864

» Sound

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MCQ▾

Question

In sonography or ultra sound scanning, the sound used is with frequency

Choices

Choice (4) Response

a.

Above 20000Hz

b.

Below 20 Hz

c.

20Hz to 20000Hz

d.

Question does not provide sufficient data or is vague

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