Physics
Two identical solid pieces, one of gold and other of silver, when immersed completely in water exhibit equal weights. When weighed in air (given that density of gold is greater than that of silver)

Both silver and gold pieces weigh equal
Weighing will depend on their masses
The gold piece will weigh more
The silver piece will weigh more

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Physics
Dynamo is a device for converting

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

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