Physics
The tidal waves on sea is mainly due to

Gravitational Effect of Sun on Earth
Gravitational Effect of Moon on Earth
None of these
Gravitational Effect of Earth on Moon

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Physics
Ice is packed in saw dust because

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

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