Physics
Two stones of different masses are dropped simultaneously from the top of a building

Both the stones reach the ground at the same time
Depends on the composition of the stone
Smaller stone reaches the ground earlier
Larger stone reaches the ground earlier

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Physics
Air moves from the region where the air ________

Pressure is high to the region where the pressure is low
Humidity is high to the region where the humidity is low
Pressure is low to the region where the pressure is high
Humidity is low to the region where the humidity is high

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Physics
Railway tracks are banked on curves so that

The train may not fall down inwards
No frictional force may be produced between the tracks and the wheels of the train
Necessary centripetal force may be obtained from the horizontal component of the weight of the train
Necessary centrifugal force may be obtained from the horizontal component of the weight of the train

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