Multiple Choice
While you are sounding a tone on a toy whistle, you notice a friend running toward you. If you want her to hear the same frequency that you hear even though she is approaching, you must
A) stay put.
B) run towards her at the same speed.
C) run away from her at the same speed.
D) stay put and play a note of higher frequency.
E) run towards her and play a note of higher frequency.
Correct Answer:

Verified
Correct Answer:
Verified
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