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Suppose there existed a planet that went...

Suppose there existed a planet that went around the Sun twice as fast as the earth. What would be its orbital size as compared to that of the earth ?

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Smaller by a factor of 0.63.
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NCERT TAMIL-GRAVITATION-EXERCISES
  1. Acceleration due to gravity is independent of mass of the earth/mass o...

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  2. The formula –G Mm(1//r(2) – 1//r(1)) is more/less accurate than the f...

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  3. Suppose there existed a planet that went around the Sun twice as fast ...

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  4. Io, one of the satellites of Jupiter, has an orbital period of 1.769 d...

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  5. Let us assume that our galaxy consists of 2.5 × 10^(11) stars each of ...

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  6. The kinetic energy of a satellite is 2 MJ. What is the total energy of...

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  7. The energy required to remove an electron in a hydrogen atom from n=10...

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  8. Does the escape speed of a body from the earth depend on (a) the mass ...

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  9. A comet orbits the sun in a highly elliptical orbit. Does the comet ha...

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  10. Which of the following symptoms is likely to afflict an astronaut in s...

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  11. In the following two exercises, choose the correct answer from among t...

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  12. For the above problem, the direction of the gravitational intensity at...

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  13. A rocket is fired from the earth towards the sun. At what distance fro...

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  14. How will you ‘weigh the sun’, that is estimate its mass? The mean orbi...

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  15. A saturn year is 29.5 times the earth year. How far is the saturn from...

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  16. A body weighs 63 N on the surface of the earth. What is the gravitatio...

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  17. Assuming the earth to be a sphere of uniform mass density, how much wo...

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  18. A rocket is fired vertically with a speed of 5 km s^(-1) from the eart...

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  19. The escape speed of a projectile on the earth’s surface is 11.2 km s^(...

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  20. A satellite orbits the earth at a height of 400 km above the surface. ...

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