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

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

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Physics
Ice is packed in saw dust because

Saw dust will not get melted easily.
Saw dust is a good conductor of heat.
Saw dust is poor conductor of heat.
Saw dust does not stick to the ice.

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