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 silver piece will weigh more
The gold piece will weigh more

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Physics
What is the principle of a ''Life Jacket"?

It increases the volume of the person to keep him afloat
It provides oxygen to a drowning person
It decreases the volume of the person to keep him afloat
The person can sit on it like a raft

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