Education on billpg industries™

Let's Measure Gravity!

Tue, 21 Apr 2026 18:53:09 +0000

When I was in high school, we measured Earth’s gravity. This number is known as “g”, or sometimes “little g” to distinguish it from “big G” which is something else.

This is an acceleration, or the rate of change of speed over time. The number is in units of meters-per-second-per-second, which means starting from rest and going at a constant acceleration, after one second you’ll be going at some number of meters-per-second. Another second after that you’ll be going twice as fast.

The Making of an Evil Genius

Sat, 23 Jan 2010 16:32:00 +0000

When I was around 9 or 10 years old, my school, as they would every year, put on a Christmas show. The younger children would re-enact the birth of Jesus of Nazareth and then the older children would perform a play. That year, we were performing Grimm’s Snow White.

I wasn’t performing on stage though. Instead, I was in charge of the music. We had a cassette of all the music and the children on stage would sing along. I would press play when its time to sing and after, position the cassette for the next song.