Most common garter snakes have a pattern of yellow stripes on a brown or green background, and their average total length (including tail) is about 55 cm (22 in), with a maximum total length of about 137 cm (54 in). The average body mass is 150 g (5.3 oz).
Centigray is a radiation absorbed dose measurement unit. A centigray (cGy) is a derived metric (SI) measurement unit of absorbed radiation dose of ionizing radiation, e.g. X-rays. The SI prefix centi stands for one hunfredths.
When trying to measure radiation there are two things being measured activity and exposure. Activity is how much radiation is coming out of something, while exposure measures the effects of that radiation on anything that absorbs it. Radiation activity is measured in an international (SI) unit called a Becquerel (Bq).