Question

look at the two wave diagrams below. which wave represents a sound wave at a higher volume?
wave a
the diagram does not indicate volume.
both show the same volume.
wave b

Explanation:

Volume of a sound wave is related to its amplitude. A higher - amplitude wave has a higher volume. In wave diagrams, the amplitude is the maximum displacement from the rest position. Looking at Wave A and Wave B, Wave B has a larger amplitude (the height from the mid - line to the crest or trough is greater for Wave B compared to Wave A).

Answer:

Wave B