Physics
Ice is packed in saw dust because

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

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Physics
Which one of the following is the correct sequence of passage of light in a compound microscope?

Objective lens -Condenser -Body tube -Eye piece
Condenser -Objective lens -Eye -piece -Body tube
Eyepiece -Objective lens -Body tube -Mirror
Condenser -Objective lens -Body tube -Eyepiece

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