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The wave equation is given y=2 xx 10^-8 ...

The wave equation is given `y=2 xx 10^-8 sin(kx+wt+phi)`. Find amplitude.

A

`2 xx 10^-8 cm`

B

`5 xx 10^-6 cm`

C

`4 xx 10^-6 cm`

D

`8 xx 10^-6 cm`

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