NSTSE (National Science Talent Search Exam- Unified Council) Class 8: Questions 1600 - 1603 of 2028

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Question 1600

Question

MCQ▾

An object is vibrating with frequency in vacuum. Therefore, if we are standing far from the object in same medium, when we can hear the sound of object?

Choices

Choice (4)Response

a.

After 40 sec

b.

Cannot hear

c.

After around

d.

Question does not provide sufficient data or is vague

Question 1601

Question

MCQ▾

Friction force acted between two bodies is:

Choices

Choice (4)Response

a.

in opposite direction of motion

b.

parallel to contact surface of the both bodies

c.

Both a. and b. are correct

d.

Question does not provide sufficient data or is vague

Question 1602

Question

MCQ▾

If depth of point A is more than depth of point B in a liquid container, then –

Choices

Choice (4)Response

a.

Pressure is equal at both points

b.

Pressure at point B is more than that at point A

c.

Pressure can be increase or decrease in liquid

d.

Pressure at point A is more than that at point B

Question 1603

Question

MCQ▾

In monsoon, thunder and flash are produced simultaneously. But flash is seen first and after few seconds thunder is heard. The reason behind it is:

Choices

Choice (4)Response

a.

Speed of sound is equal to speed of light.

b.

Speed of sound is less than speed of light

c.

Speed of sound is more than speed of light.

d.

None of the above

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