Gallagher Combined School

What is Moore’s law and where is it taking us?

28 July 2022

Way back in 1965, when transistors were just graduating from things that looked like 6mm diameter top hats, Gordon Moore noticed that the number of transistors on a microchip was doubling every 2 years. He predicted that this trend would continue for the coming 10 years. He later revised…

How’s your air quality?

8 July 2022

When we moved to Knysna just over a year ago, we found a lot of differences between Jo’burg and our new home town. The weather is very different to that in Johannesburg (which is amongst the best in the world). It can be very cold in summer and 29 degrees…

What is special about a keystone in an arch?

3 July 2022

Actually, there’s nothing particularly special about the keystone, except that it happens to be the last stone to be put in place. All of the stones in an arch are very important as you can see in this illustration. Remove any one of them and the arch will collapse.