Subjective Type

A single pulse, given by $$ h(x-5.0 t), $$ is shown in Fig. $$ 16-45 $$ for $$ t=0 . $$ The scale of the vertical axis is set by $$ h_{s}=2 . $$ Here $$ x $$ is in centimeters and $$ t $$ is in seconds.What is the speed of travel of the pulse?

Solution

comparing with equation $$y=h(x-vt)$$
here $$v$$ is the speed of the wave.
we see that the speed of the wave given by a function with argument $$ x-5.0 t $$ (where $$ x $$ is in centimeters and $$ t $$ is in seconds)must be $$ 5.0 \mathrm{cm} / \mathrm{s} $$

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