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A wave is represented by the equation: y...

A wave is represented by the equation: `y=Asin(0.4pix+7pit+pi/3)`, where x in meter and t in second. The expression represents

A

A wave travelling in the negative x- direction with a velocity 0.15 m/s

B

A wave travelling in the positive x- direction with a velocity 0.2 m/s

C

A wave travelling in the positive x-direction with a velocity 0.15m/s

D

A wave travelling in the negative x-direction with a velocity 17.5m/s

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The correct Answer is:
D
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