I just learned aboud sound waves in my science class. So, after reading this article I found it interesting just by all the differrnt ways we can use sound waves to discover objects we cant see. In class, we did an experiement where we would use vibrations to see if either a sold, liquid, or a gas would produce a louder pitch. I found it very intersting and neat to be able to see how different objects have an affect on the type of sound wave that is produced.
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