E3 practical: Measuring half life of beer foam support
The problem with experiments on radioactive decay is that you need a source that has a reasonably small half life, I used to have a Protactinium generator which stopped producing any radiation several years ago and I have just discovered should be sent away for disposal. This was very convenient since it was activated by shaking and had a short half life. The problem was that I only had one (and one GM tube) so it...