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Which Material Of Cup Makes The Soundwaves?

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Which Material Of Cup Makes The Soundwaves?
Problem:
In my science project the experiment answers three questions. One question is which material of cup makes the soundwaves more clear. The second question is what pitch of sound makes the most condensed sound pattern on the water. The third question is how loud does the speaker need to be to make a pattern show up on the water’s surface. Hypothesis:
I think that a styrofoam cup will make the sound patterns most clear out of all the materials of cups. I think this because when you slide a styrofoam cup on a table sometimes you can see cool circle patterns on the water’s surface. I think that a high pitch will make the sound waves patterns more condensed. I think that you will need to have the sound up pretty loud for it to make

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