Physics
Which of the following branch of Physics deal with study of Atomic Nuclei?

Atomic Physics
Nuclear Physics
Bio Physics
None of these

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Physics
On a cold day when a room temperature is 15oC, the metallic cap of a pen becomes much colder than its plastic body, though both are at the same temperature of 15oC, because

metals have higher thermal capacity than plastics
metals are good conductor of heat
plastics have a higher thermal conductivity than metals
plastics have a lower density than metals

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Physics
Dynamo is a device for converting

Chemical energy into electrical energy
Magnetic energy into electrical energy
Mechanical energy into electrical energy
Heat energy into electrical energy

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