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#1. The earth satellite Aryabhata was put in orbit by India on

#2. The minimum velocity required by a satellite to escape earth's gravitational pull is

#3. When a satellite is in a geostationary orbit the force keeping it in orbit is

#4. The period of a geostationary (synchronous) satellite orbiting the earth over the equator is

#5. A bomb is released horizontally from an orbiting artificial earth satellite. The bomb will

#6. The orbital velocity of a satellite close to the earth at a distance r from the centre of the earth is given by formula v = √rg. If r = 6.4 x 106 m and g=9.8 ms-2 the orbital velocity of the artificial satellite will be approximately

#7. The escape velocity of a satellite projected from the surface of the earth is independent of

#8. For an artificial satellite of earth

#9. For existence of atmosphere on a planet,

#10. A satellite circling round the earth in air-free space

#11. If M is the mass of the substance, V its volume and D its density, then find out which is wrong

#12. When ice melts, its volume

#13. Specific gravity is defined as the ratio of the density of

#14. . S.I. unit of density is expressed in

#15. Arrange the following in the ascending order of their densities - (A) cork | (B) ice. | (C) Sea water | (D) River water

#16. When water is cooled from 4°C to 2°C its density

#17. When a steel ball is placed on the surface of mercury, it does not sink because

#18. A piece of ice is floating in water kept in a beaker. When all the ice melts the level of water will

#19. The density of water in the S.I. system is

#20. . What volume does 680 g of mercury occupy if density of mercury is 136000 kg -3

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