Physics
In a particular system, the units of length, mass and time are chosen to be 10 cm, 10 g and 0.1 s respectively. The unit of force in this system will be equivalent to

10 N
100 N
1 N
0.1 N

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Physics
Ice is packed in saw dust because

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

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