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Help me answer this pls!
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20 votes
Help me answer this pls!

Help me answer this pls!-example-1
User Pervez
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2 Answers

3 votes

Answer:

a would be hearing the sound b would be the sound wave

hope this helps

Step-by-step explanation:

User Xianshenglu
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13 votes
a would be compression and b refraction
User Berhir
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