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A sound wave leaves the loudspeaker. As it travels, it experiences a temporary increase in wavelength and then returns to its original wavelength. Which of the following scenarios could explain this change in wavelength? Select ALL that apply.
A
The sound wave traveled into the rocky ground.
B
The sound wave traveled through a glass of water.
C
The sound wave reflected off of a rock wall nearby.
D
The sound wave traveled through a person walking along the shore.
E
The sound wave traveled through a helium balloon (helium is less dense than air).
