NSTSE (National Science Talent Search Exam- Unified Council) Class 9: Questions 1415 - 1420 of 1998

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Question 1415

Question MCQ▾

If a ball of mass is freely fallen from the top of a tower of height , then its kinetic energy after will be:

Choices

Choice (4)Response

a.

b.

c.

d.

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Question 1416

Question MCQ▾

If 1 g sulphur dioxide contains x molecules, what will be the number of molecules in of methane?

Choices

Choice (4)Response

a.

molecules

b.

molecules

c.

molecules

d.

molecules

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Question 1417

Question MCQ▾

If ripples produced in in a pond of water, then time period and the frequency of ripple formation are respectively:

Choices

Choice (4)Response

a.

b.

c.

d.

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Question 1418

Question MCQ▾

A spring has an initial stretch . The stretch is increase and becomes 45 cm. If force constant of the spring is , then increase in potential energy is about:

Choices

Choice (4)Response

a.

b.

c.

d.

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Question 1419

Question MCQ▾

Two object of masses and are moving along the same line and direction with velocities of and respectively.

They collide and after the collision the first object moves at a velocity of . Determine the velocity of the second object.

Choices

Choice (4)Response

a.

b.

c.

d.

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Question 1420

Question MCQ▾

A block of mass is taken to a height above the earth՚s surface, where is the radius of the earth. If the body is now raised through a height , the potential energy increase by:

Choices

Choice (4)Response

a.

b.

c.

d.

None of the above

Edit