Physics
What is the full form of "RADAR" ?

Radio Detecting and Ranging
Radio Detect and Rangs
Region Device and Ranging
Radio Device and Ranging

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Physics
What is the direction of torque?

Perpendicular to the direction of applied force
Opposite to the direction of applied force
Same as the direction of applied force
Parallel to the radius

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Physics
When a pail of water is swung in a vertical circle, the water does not fall out at the top of the loop when the speed is

Above a certain minimum value irrespective of amount of water in the pail
Below a certain minimum value irrespective of amount of water in the pail
Above a certain minimum value depending on amount of water in the pail
Below a certain minimum value depending on amount of water in the pail

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