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Based on the data in the table, what will happen when a sound wave travels from copper into aluminum?

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

A. The wave will get completely absorbed.
B. The wave will speed up.
C. The wave will change in frequency.
D. The wave will slow down.

Sagot :

GinnyAnsweridn
When a sound wave travels from one medium to another, its speed changes depending on the properties of the materials. In this case, we are examining the transition of a sound wave from copper to aluminum.

Refer to the speeds of sound provided for each material:
- Copper: 5,010 m/s
- Aluminum: 6,420 m/s

Comparing these speeds:
- The speed of sound in copper is 5,010 m/s.
- The speed of sound in aluminum is greater, at 6,420 m/s.

Since the speed of sound in aluminum is higher than in copper, the sound wave will travel faster in aluminum than it does in copper. Therefore, when a sound wave travels from copper into aluminum, it will speed up.

Thus, the correct answer is:

B. The wave will speed up.
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