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For the wave equation,
\[
y=(4 \mathrm{~cm}) \sin [\pi t+2 \pi x]
\]
Here, \( t \) is in second and \( x \) in metres.
\begin{tabular}{l|l|l}
\hline & Column I & \multicolumn{2}{|c}{ Column II } \\
\hline (a) at \( x=0 \), particle velocity is maximum at \( t= \) & (p) \( 0.5 \mathrm{~s} \) \\
(b) at \( x=0 \), particle acceleration is maximum at \( t= \) & (q) \( 1.0 \mathrm{~s} \) \\
(c) at \( x=0.5 \mathrm{~m} \), particle velocity is maximum at \( t= \) & (r) zero \\
(d) at \( x=0.5 \mathrm{~m} \), particle acceleration is maximum & (s) \( 1.5 \mathrm{~s} \) \\
& at \( t= \) & \\
\hline
\end{tabular}
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