Two Harmonic Waves Are Described By $y_{1}=(3 \mathrm{~cm}) \sin \left(\frac{8.0}{\mathrm{~m}} x+\frac{2.0}{\mathrm{~s}} t\right)$

question 5

Multiple Choice

Two harmonic waves are described by: $y_{1}=(3 \mathrm{~cm}) \sin \left(\frac{8.0}{\mathrm{~m}} x+\frac{2.0}{\mathrm{~s}} t\right)$ $y_{2}=(3 \mathrm{~cm}) \sin \left(\frac{8.0}{\mathrm{~m}} x-\frac{2.0}{\mathrm{~s}} t\right)$ What is the magnitude of the speed (in m/s) of the two travelling waves?

• A)16
• B)4.0
• C)8.0
• D)0.25
• E)2.0

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