11. The centre of gravity of a sprinter during the race lies
12. Who enunciated the laws of planetary motion?
13. The tidal waves on sea is mainly due to
14. The time period of a pendulum when taken to the Moon would:
15. "God Particle" is
16. The mass of a star is two times the mass of the Sun. How it will come to an end ?
17. Which of the following celestial bodies contains abundant quantities of helium-3, a potential source of energy ?
18. The period of revolution of a certain planet in an orbit of radius R is T. Its period of revolution in an orbit of radius 4R will be:
19. Which is evidence that supports the dynamo theory?
20. Which of the following is indicated by the colour of a star ?
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