Part $($b$)$ A third student uses a slow$-$motion camera to observe the pulse and measures that it takes a time $t_2=0\mathrm{.}15s$ for the full width of the pulse to pass by her. She also carefully measures the height of pulse $($from the equilibrium level of the rope to the pulse's peak$)$ to be $h=0\mathrm{.}15m.$ What is the pulse's width, in meters?

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