Physics
In which of the following cases, kinetic energy is being used in performing work ?

Driving a car to cover a distance
Paddling the bicycle to cover a distance
Wind mill grinding wheat grain
Rowing a boat in the lake

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Physics
Rainbows are produced when sunlight :

Incident on rain drops hanging in the atmosphere is dispersed after suffering refraction and internal reflection.
Incident on rain drops hanging in the atmosphere is dispersed after suffering refraction
Incident on raindrops hanging in the atmosphere is dispresed after suffering reflection.
None of the given statements is correct.

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