21.8 Genes

People have been selectively breeding animals and plants for thousands of years – to provide better sources of materials for food and clothing or for decoration. Carassus auratus is a small brown fish related to the carp. But, occasionally, an individual appears with an unusual shape or colour (usually red or yellow). By selectively breeding… Continue reading 21.8 Genes

21.1 An electrical simple harmonic oscillator

While I was compiling the index to this blog, I noticed that I had written several posts about mechanical simple harmonic oscillators but hadn’t written anything about electrical simple harmonic oscillators– the subject of this post. A simple harmonic oscillator is a system that oscillates indefinitely by exchanging potential and kinetic energy. In a real… Continue reading 21.1 An electrical simple harmonic oscillator