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

Fall
First rise and then fall
Rise
Remain the same

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Physics
RADAR is used for:

locating geostationary satellites.
locating submerged submarines.
receiving a signals in a radio receiver.
detecting and locating the position of objects such as Aeroplanes.

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

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