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
Both silver and gold pieces weigh equal
The gold piece will weigh more

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Physics
A standing wave occurs when

The amplitude of a wave exceeds its wavelength
The speed of the wave is zero or near zero
A wave reflects upon itself
Two waves overlap

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