Asked by a
Two waves are traveling through a tube. Wave X has an amplitude of 1 cm, and wave Y has twice the amplitude of wave X. The energy of wave Y is
A.
half times that of wave X.
B.
one-fourth times that of wave X.
C.
four times that of wave X.
D.
two times that of wave X.
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Answered by
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C. Four times that of wave X.
Reason: mechanical wave energy is proportional to the square of the amplitude (E ∝ A^2). If amplitude doubles, energy = (2A)^2 = 4A^2.
Reason: mechanical wave energy is proportional to the square of the amplitude (E ∝ A^2). If amplitude doubles, energy = (2A)^2 = 4A^2.
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