NSO Level 1- Science Olympiad (SOF) Class 9: Questions 1028 - 1031 of 1128

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Question 1028

Question

MCQ▾

In stethoscopes, the sound of the patient՚s heartbeat reaches the doctor՚s ears by

Choices

Choice (4)Response

a.

Single reflection

b.

Multiple reflections

c.

Multiple rare fractions

d.

Multiple refractions

Question 1029

Question

MCQ▾

A small bullet fired from a gun can cause more threat to the life of a person than a bus moving with a speed of 5km/s. Which of the following statements would be the correct explanation of this fact?

Choices

Choice (4)Response

a.

The impact produced by the object depends on its mass and velocity.

b.

Momentum of the bullet is many times greater than that of the bus.

c.

Both a. and b. are correct

d.

Question does not provide sufficient data or is vague

Question 1030

Question

MCQ▾

The acronym SONAR stands for

Choices

Choice (4)Response

a.

Sound Navigation Amplitude Ranging

b.

Source of Noise and Response

c.

Source of Noise and Reflection

d.

Sound Navigation and Ranging

Question 1031

Question

MCQ▾

The value of is minimum at equator and maximum at poles. The reason behind this statement is

Choices

Choice (4)Response

a.

The centripetal force of earth is weaker at equator than that at poles

b.

The radius at the equator is more than that at poles

c.

Both a. and b. are correct

d.

Question does not provide sufficient data or is vague

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