Physics
According to the Second Law of Motion, for a given force, acceleration is inversely proportional to the ________ of an object.

Density
Volume
Mass
Force

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Physics
The earth is a

Good reflector of heat
Bad absorber and bad radiator of heat
Non-absorber of heat
Good absorber and good radiator of heat

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Physics
Ice is packed in saw dust because

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

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