Physics
Which of the following terms is not used in the field of physics?

Nuclear fusion
Stock value
Latent heat
Refractive index

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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)

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

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