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Which of the following is correct?...

Which of the following is correct?

A

an astronaut in going from earth to moon will experience weightlessness once.

B

When a thin unform spherical shell gradually shrinks maintaining its shape, the gravitational potential at its centre decreases.

C

In the case fo spherical shell, the piot of `V` versus `r` is continuous.

D

In the case spherical shell, the plot of gravitational field intensity, I versus `r`, is continuous

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The correct Answer is:
A, B, C
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  2. particles of masses 2M m and M are resectively at points A , B and C w...

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  3. Which of the following options are correct ?

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  4. If the law of gravitational, instead of being inverse-square law, beco...

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  5. If the mass of sun were len times smaller and gravitational consitant ...

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  6. If the sun and the planets carried huge amounts of opposite charges

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  7. There have been suggestions that the value of the gravitational consta...

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  8. Supposing Newton's law of gravitation for gravitation force F(1) and F...

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  9. Which of the following are true?

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  10. The centre of mass of an extended body on the surface of the earth and...

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  11. An artificial satellite is going round the earth, close to its surface...

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  12. A satellite revolves in an orbit close to the surface of a planet of m...

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  13. An artifical satellitee of mass 100 kg is in a circular orbit at 500 k...

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  14. A body is to be projected vertically upwards from earth's surface to r...

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  15. Given that T^(2) = kR^(3), express the constant k of the above relatio...

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  16. Which of the following is correct?

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  17. An object is weighted at the North Pole by a beam balance and a spring...

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  18. For a planet moving and the sun in an elliptical orbit, which of the f...

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  19. If a satellite orbits as close to the earth's surface as possible,

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  20. A satellite is to be geo-stationary, which of the following are essent...

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