191. The profile of a transverse wave on a string at moment $t = 0\,\text{s}$ is shown in the figure below. If $\dfrac{1}{300}\,\text{s}$ is the time for one full wavelength to pass, how many seconds does it take for point M to reach position $x = 2\,\text{cm}$ from point M?
[Figure: A transverse wave profile showing a sinusoidal wave. The y-axis is labeled $y\,(\text{cm})$ with amplitude 2, the x-axis is labeled $x\,(\text{cm})$. Points N and M are marked on the wave. The wave travels with velocity $V = 40\,\text{m/s}$ to the right. The wavelength appears to be $30\,\text{cm}$.]
\textbf{191.} The profile of a transverse wave on a string at moment $t = 0\,\text{s}$ is shown in the figure below. If $\dfrac{1}{300}\,\text{s}$ is the time for one full wavelength to pass, how many seconds does it take for point M to reach position $x = 2\,\text{cm}$ from point M?
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\textit{[Figure: A transverse wave profile showing a sinusoidal wave. The y-axis is labeled $y\,(\text{cm})$ with amplitude 2, the x-axis is labeled $x\,(\text{cm})$. Points N and M are marked on the wave. The wave travels with velocity $V = 40\,\text{m/s}$ to the right. The wavelength appears to be $30\,\text{cm}$.]}
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(1) $\dfrac{1}{150}$ \hfill (2) $\dfrac{1}{60}$ \hfill (3) $\dfrac{7}{600}$ \hfill (4) $\dfrac{1}{120}$
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