Light Speed: From Minecraft to Reality

Using Minecraft to explain speed of light.

 

Why Blowing in Bottles Makes Sound and Helmholtz Resonance

An explanation of why blowing in a bottle makes a sound, basically explaining how Helmholtz resonance works and how to bottles are Helmholtz resonators. The same explanation works for what role the speaker plays in moving objects/bottles using sound, the acoustic propulsion in one of my other videos below. This also explains a bit about resonant frequency and compares the sound wave compression and decompression to an oscillating spring, a simple harmonic oscillator.

 

Electrostatic Precipitator/Smoke Precipitator - How it Works/How to Make

This electrostatic precipitator, or smoke precipitator, gets rid of most smoke by using high voltage to collect smoke particles. This shows how the electrostatic precipitator works and how to make your own electrostatic precipitator.

What Color Is A Mirror?

Mirrors, reflection, colors...

 

ScienceCasts: A Sudden Multiplication of Planets

This week, NASA announced a breakthrough addition to the catalog of new planets. Researchers using Kepler have confirmed 715 new worlds, almost quadrupling the number of planets previously confirmed by the planet-hunting spacecraft. Some of the new worlds are similar in size to Earth and orbit in the habitable zone of their parent stars.

 

What we can learn from galaxies far, far away - Henry Lin

In a fun, excited talk, teenager Henry Lin looks at something unexpected in the sky: galaxy clusters. By studying the properties of the universe's largest pieces, says the Intel Science Fair winner, we can learn quite a lot about our own world and galaxy.