Physics
When a person sitting on a swing stands up on the swing, the frequency of oscillation

Increases
Does not change
Decreases
Becomes infinite

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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

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

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Physics
Which of the following options correctly explains the term heat budget?

It is a mode of transfer of heat through matter by molecular activity.
It is the radiation from the earth in the form of long waves.
It is the amount of heat which the surface of earth receives from the sun.
It is the balance between incoming and outgoing radiation

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