So one time in science class we were studying sound. Our teacher showed us a video using a subwoofer with water. I actually managed to find that video. It's very interesting if you're in to sound physics.

https://www.youtube.com/watch?v=THUMdTohWkI

Did you find this interesting/useful? If I find something else interesting I'll be back next month.

I have something even better: CYMATICS: Science Vs. Music by Nigel Stanford

Do watch it in 4k, while the music is enhanced and prettied up in post production the base frequencies and experiments are the same, there is also a short Making Of at the very end.

A subwoofer? Is that what you call a dog when it's underwater?

Eh?