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MCQ Tutorial - Physics->Gravitational

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6.) The atmosphere is held to the earth by:
Options are:
A.) Gravity
B.) Winds
C.) Light
D.) Clouds
7.) At what height from the ground will the value of g be the same as that in 10 km deep mine below
the surface of earth:
Options are:
A.) 20 km
B.) 30 km
C.) 50 km
D.) 15 km
                        
8.) The value of g at a particular point is 9.8 m/s2 . Suppose the earth suddenly shrinks uniformly to
half its present size without losing any mass. The value of g at the same point (assuming that the
distance of the point from the centre of earth does not shrink) will now be:
Options are:
A.) 19.6 m/s2
B.) 3.1 m/s2
C.) 9.8 m/s2
D.) 4.9 m/s2
                        
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