Physics
A sphere rolls down on two inclined planes of different angles but same height, it does so

With the same speed
In the same time with the same kinetic energy
In the same time with the same speed
In the same time

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Physics
Ice is packed in saw dust because

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

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