Physics
In hydro power station, the motion produced in turbines is due to

Burning of diesel
Flow of water
Production of steam
Burning of coal

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Physics
Rain drops fall from great height. Which among the following statements is true regarding it?

Their velocity increases and they fall with same velocity on the earth
They fall with that ultimate velocity, which are different for different droplets
They fall with same ultimate velocity
Their velocity increases and they fall with different velocity on the earth

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Physics
A boy is swinging a ball attached to a string in a horizontal circle. If the string snaps

It will continue to travel along a tangent to the circle at the point the ball was at the time of snapping and finally fall down
None of these
It will fall down at the same place where the string breaks
The ball will travel towards the center of the circle and fall down

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