Use different noise-making objects to cause sound waves and make sand move! Sound waves are invisible to our eyes; unless we find a way to make the sound waves move something that we can see. In this ...

Hey all! So all my life I have heard that sound is a type of wave. This seemed to make sense to me. Recently I have come across some information that has me second guessing such tradition knowledge.

It’s a question I’m sure was keeping you up at night: can you make an object spin with a sound wave? The answer, generally speaking, used to be no. Now, though, mechanical engineers have taken a look ...