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The harmonic wave yi = (2.0 xx 10^(-3)) ...

The harmonic wave `y_i = (2.0 xx 10^(-3)) cos pi (2.0x - 50t)` travels along a string towards a boundary at x=0 with a second string. The wave speed on the second string is `50 m//s`. Write expressions for reflected and transmitted waves. Assume SI units.

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(a) `(6.67 xx 10^(-4)) cos pi (2.0 x + 50t)`
(b) `(2.67 xx 10^(-3)) cos pi (1.0 x - 50 t)` SI units
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