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Why the lighter gases like H2, He are r...

 Why the lighter gases like `H_2, H_e` are rare in earth ?

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`implies`  Generally average speed of molecules of lighter gas is more than the escape speed from the surface of earth. Therefore, lighter molecules have a greater chance to escape from the earth.
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KUMAR PRAKASHAN-GRAVITATION-Section - C Objective Questions (VSQs)
  1. For a satellite escape velocity is 11.2 km/s from the earth. If the sa...

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  2. Is it necessary to give initial speed of 11.2 km/s to  a rocket for it...

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  3. Why the lighter gases like H2, He are rare in earth ?

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  4. Name two factors which determine whether a  planet has an atmosphere o...

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  5. Is the angular velocity of planet dependon mass?

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  6. Let a planet revolving close to the earth, Obtain relation between esc...

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  7. Does speed of planet remain constant in an orbit?

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  8. What is the effect of decreasing the height of a satellite orbiting ar...

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  9. The escape velocity on the surface of earth is 11.2 km/s. What will be...

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  10. Find the kinetic energy needed to project a body of mass m from the su...

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  11. What is the escape velocity from a black hole ?

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  12. As astronaut dropped a spoon from outside spacecraft will the spoon re...

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  13. Give the name of first Indian Astronaut.

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  14. What is the frequency of oscillation of a  pendulum mounted in a lift ...

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  15. Distance of two planets from the sun are 10^11 m and 10^(10) m respec...

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  16. In Bohr’s model, the atomic radius of the first orbit is r. Then, the ...

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  17. If any satellite has kinetic energy 6 xx 10^(9)J , then what its poten...

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  18. A satellite has potential energy -8 xx 10^(9)J, then what is its bindi...

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  19. The ratio between Bohr radii is

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  20. What are the factors on which escape velocity depends on ?

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