Syllabus Aims…
7.1 use the following units: becquerel (Bq), centimetre (cm), hour (h), minute (min), second (s).
Definitions…
The Becquerel symbol: Bq is the SI derived unit of radioactivity. One Becquerel is defined as the activity of a quantity of radioactive material in which one nucleus decays per second. The Becquerel is therefore equivalent to an inverse second, s−1.
Metre (m): the fundamental unit of length in the metric system, equal to 100 centimetres or approximately 39.37 inches. 1cm = 0.01m
The second is the SI base unit of time, commonly understood and historically defined as 1⁄86400 of a day – this factor derived from the division of the day first into 24 hours, then to 60 minutes and finally to 60 seconds each. There are 602 seconds or 3600s in 1 hour and 24*602 = 86400 in a day
Resources…
Use this PowerPoint for a quick review…7A Radioactivity and Particles
