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Kinetic Theory of Gases Questions And Answers.

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Exercise :: Kinetic Theory of Gases
1.The mass of the moon is 1% of the mass of the earth. The ratio of gravitational pull on moon and that of moon in earth will be ?
A. 1:1
B. 1:10
C. 1:100
D. 2:1
2.If the earth loses its gravity, then for a body ?
A. Weight becomes zero
B. Mass becomes zero
C. Neither mass nor weight is zero
D. Both mass and weight are zero
3.A ball is dropped from a spacecraft revolving around the earth at a height of 120km. What will happen to the ball?
A. It will go very far in the space
B. It will move with the same speed tangentially to the spacecraft
C. It will fall down to the earth gradually
D. It will continue to move with the same speed along the original orbit of the spacecraft
4.The velocity with which a projectile must be fired so that it escapes the earth’s gravitational field doesn’t depend on?
A. Mass of the earth
B. Mass of the projectile
C. Radius of the orbit
D. Universal gravitational constant
5.The escape velocity of a projectile from the earth is approximately?
A. 7km/sec
B. 11.2km.sec
C. 112km/sec
D. 1.1km/sec