wordpress.mrreid.org

Stuff that interests Mr Reid, a physicist and teacher

Traditionally human beings are traditionally said to possess five senses: sight (vision), hearing (audition), touch (tactition), taste (gustation) and smell (olfaction). But you have many more sens...

Aluminium is a very useful metal; it is the most widely used non-ferrous* metal in the world. It has a very low electrical resistance and a very good strength-to-weight ratio and has therefore found m...

Dawn occurs before sunrise, before the top of the Sun reaches the horizon. Astronomical Dawn is the point at which it becomes possible to detect light in the sky, when the sun is 18° below the horizon...