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 | |
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a. | ||
b. | ||
c. | ||
d. |
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 | |
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a. | molecules | |
b. | molecules | |
c. | molecules | |
d. | molecules |
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 | |
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a. | ||
b. | ||
c. | ||
d. |
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 | |
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a. | ||
b. | ||
c. | ||
d. |
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 | |
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a. | ||
b. | ||
c. | ||
d. | None of the above |