Aimee and Patrick are playing hide-and-seek on a summer day. Aimee gives Patrick a clue to her location by knocking three times every 30 seconds. Which characteristic of waves makes this a useful clue to help Patrick find Aimee?
A. Wave energy increases with distance.
B. Wave energy decreases with distance.
C. Sound waves travel faster in cold air than in warm air.
D. Sound waves travel faster in warm air than in cold air.
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Aimee and Patrick are playing hide-and-seek on a summer day. Aimee gives Patrick a clue to her locat...
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