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Solved: A sinusoidal wave can be described by a cosine
Chapter 15, Problem 13DQ(choose chapter or problem)
QUESTION:
Problem 13DQ
A sinusoidal wave can be described by a cosine function, which is negative just as often as positive. So why isn’t the average power delivered by this wave zero?
Questions & Answers
QUESTION:
Problem 13DQ
A sinusoidal wave can be described by a cosine function, which is negative just as often as positive. So why isn’t the average power delivered by this wave zero?
ANSWER:Step 1 of 2
The expression for average power of sinusoidal wave is given by,
,
where is linear mass density, is force in the string, is angular frequency and A is the amplitude.