radio carbon dating wikipedia
{"Image DocumentName": "Radio-Carbon Dating", "Image ImageDescription": "Radio-carbon dating is used to estimate the age of objects that were once living. All living things contain a small amount of radioactive carbon 14 . Carbon 14, which has a half-life of 5700 years, decays to carbon 12. By measuring the activity of a sample of dead tissue, its approximate age can be determined. Activity is measured in counts per minute (counts min\u20131). A sample of living wood has an activity of 16 counts min\u20131 per gramme. Calculate the activity of a 20 g sample of living wood. 1 gramme = 16 counts min\u20131. \u0013 20 g = 16 x 20 counts min\u2013 counts min\u20131. A. NZQA", "Image XResolution": "37", "Image YResolution": "37", "Image ResolutionUnit": "Pixels/Centimeter", "Image Software": "SlidePlayer", "Image YCbCrPositioning": "Centered"}