NSO Level 1- Science Olympiad (SOF) Class 9: Questions 644 - 649 of 2138

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Question 644

Question MCQ▾

An artificial satellite moves in the orbits of radius around the earth. The acceleration of such a satellite assuming that the only force acting on it is that due to the earth is:

Choices

Choice (4)Response

a.

b.

c.

d.

Edit

Question 645

Question MCQ▾

If the slope of velocity – time graph is negative, then the motion is:

Choices

Choice (4)Response

a.

Retarded

b.

Uniform acceleration

c.

Uniform velocity

d.

Accelerated

Edit

Question 646

Question MCQ▾

Exit of water in sponges takes place through

Choices

Choice (4)Response

a.

Osculum

b.

Cloaca

c.

Ostia

d.

None of the above

Edit

Question 647

Question MCQ▾

If identical particles of masses and are moving with velocities and , respectively; then the ratio of their kinetic energy is:

Choices

Choice (4)Response

a.

b.

c.

d.

Edit

Question 648

Question MCQ▾

Animals that don՚t have backbone is known as

Choices

Choice (4)Response

a.

Vertebrate

b.

Annelids

c.

Invertebrate

d.

Arthropods

Edit

Question 649

Question MCQ▾

If two bodies are in contact, then the direction of force of friction between these two bodies is:

Choices

Choice (4)Response

a.

Parallel to the contact surface

b.

Inclined at to the contact surface

c.

Normal to the contact surface

d.

Inclined at to the contact surface

Edit