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A student is transmitting sound waves through various materials. Through which metal in the table will the sound waves travel the fastest?

\begin{tabular}{|l|c|c|c|c|}
\hline & Aluminum & \begin{tabular}{c}
Brass \\
[tex]$(70\% \text{Cu}$[/tex], \\
[tex]$30\% \text{Zn})$[/tex]
\end{tabular} & Copper & Lead \\
\hline \begin{tabular}{l}
Speed of \\
sound \\
[tex]$(\text{m/s})$[/tex]
\end{tabular} & 6,420 & 4,700 & 5,010 & 1,960 \\
\hline
\end{tabular}

A. Brass
B. Lead
C. Copper
D. Aluminum



Answer :

GinnyAnswer
To determine through which metal the sound waves will travel the fastest, we need to compare the speeds of sound in the given metals. The speeds of sound in the materials are as follows:

- Aluminum: 6,420 m/s
- Brass (70% Cu, 30% Zn): 4,700 m/s
- Copper: 5,010 m/s
- Lead: 1,960 m/s

The highest speed of sound among the metals is observed in Aluminum, with a speed of 6,420 m/s. This indicates that sound waves will travel the fastest through Aluminum compared to the other metals listed.

Thus, the correct answer is:

D. Aluminum

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