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This past week in my science class we discussed sound waves and tested whether or not a sound is louder moving through solid, liquid, or gas. This article was very interesting as it talked about another type of wave which is radio waves and how they are the sole purpose of our ability to use our cell phones. It is also interesting how it states the discovery of how sound waves may carry mass and how that idea was thought to be impossible. I want to read more about that and how they came to the conclusion of waves having mass.