Physics
A tank filled partially with a liquid is subjected to a uniform horizontal acceleration. Which of the following is true for the surface of liquid in the tank?

The liquid surface falls down only at the center of the tank
The liquid surface falls down on the direction of motion and rises up on the back side of the tank
The surface of the liquid remains horizontal
None

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Physics
Ice is packed in saw dust because

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

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