Physics
What is the unit of the physical quantity Entropy?

Watt per kelvin
Newton per kelvin
Pascal per kelvin
Joule per kelvin

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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
Solar eclipse will take place when

the moon does not lie on the line joining the sun and the earth
the earth is between the moon and the sun
the moon is between the sun and the earth
the sun is between the moon and the earth

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