7 Radioactivity and Particles – Part A “Units”

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

 

Useful Videos…

Extension Ideas…

Permanent link to this article: https://animatedscience.co.uk/1-forces-and-motion-units-a-2-2-2-2-2-2-2-2-14

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