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There is no atmosphere on the moon, beca...

There is no atmosphere on the moon, because

A

it is closer to the earth and also it has the inactive inert gases in it.

B

it is too far from the sun and has very low pressure in its outer surface

C

escape velocity of gas molecules is greater than their root mean square velocity.

D

escape velocity of gas molecules is less than their root mean square velocity.

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MODERN PUBLICATION-Unit Test - Gravitation-Example
  1. The mass of moon is 1/81 of earth's mass and its radius 1/4 of that of...

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  2. The escape Velocity from the earth is 11.2 Km/s^-1. The escape Velocit...

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  3. There is no atmosphere on the moon, because

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  4. A missile is launched with a velocity less than the escape velocity. T...

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  5. A satellite S is moving in an elliptical orbit around the earth. The m...

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  6. A satellite of the earth is revolving in a circular orbit with a unifo...

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  7. Two satellites of masses m1 and m2 (m1 gt m2) are revolving around ear...

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  8. If v be the orbital velocity of a satellite in a circular orbit close ...

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  9. A satellite is in an orbit around the earth. If its kinetic energy is ...

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  10. An 80 kg person is parachuting and is experiencing a downward accelera...

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  11. Assertion The stars twinkle, while the planets do not. Reason: The st...

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  12. Assertion: A planet is a heavenly body revolving round the sun. Reaso...

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  13. Assertion: The comets do not obey Kepler's laws of planetary motion R...

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  14. Assertion: The square of the period of revolution of a planet is propo...

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  15. Assertion: If the radius of the earth's orbit around the sun were twic...

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  16. Assertion: The earth is slowing down and as a result the moon is comin...

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  17. Assertion: The length of the day is slowly increasing Reason: The dom...

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  18. Assertion: The mass of the earth in terms of g, Rand G is given by M=g...

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  19. The change in the value of g at a height h h lt lt R above the surface...

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  20. Assertion: A tennis ball bounces higher on hills than in plains Reason...

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