Physics · 1 lesson · 1 quick hit

Light and sound

A paper cup that out-shouts a real speaker, and glass that vanishes in cooking oil.

  1. Lesson 113:50Cup speaker is louder than this real one?!Learn how to make a speaker!!! You just need copper wire, a cup or bowl, and a strong neodymium magnet. We then and compare it to a professional $169.99 speaker.

Quick hits

Under a minute each. Good for a "watch this" before dinner.