Biology, 12.03.2021 06:40 greend0719
7
While visiting a historical fort, John watched a demonstration of the firing of an old cannon from a distance of 50 m. When
the cannon fired, John heard a loud boom a second later. What was the medium that allowed the sound waves to reach
John?
A the ears
B the cannon
C the air
D the ground
Answers: 3
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