# Archive for November, 2012

## Friday math movie: How things in nature tend to sync up

## Derivative graphs interactive

## Volume of a pendant

## IntMath Newsletter: Headphones, Desmos, Ada, impedance interactive

In this Newsletter:

1. How do noise canceling headphones work?

2. Complex numbers interactive

3. Math tool: Desmos Graphing Calculator

4. Ada's story

5. Math puzzles

6. Friday math movies

7. Final thought - doing nothing

## How do noise canceling headphones work?

## Full archive

See the blog sitemap for all previous articles.