Two Harmonic Waves Travelling in Opposite Directions Interfere to Produce

question 18

Multiple Choice

Two harmonic waves travelling in opposite directions interfere to produce a standing wave described by y = 2 sin (4x) cos (3t) where x is in m and t is in s. What is the speed (in m/s) of the interfering waves?

• A)0.75
• B)0.25
• C)1.3
• D)12
• E)3.0

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