Charcoal samples from Stonehenge in England wereburned in O2, and the resultant CO2 gas bubbled into asolution of Ca(OH)2 (limewater), resulting in the precipitationof CaCO3. The CaCO3 was removed by filtration anddried. A 788-mg sample of the CaCO3 had a radioactivityof 1.5x 10-2 Bq due to carbon-14. By comparison, livingorganisms undergo 15.3 disintegrations per minute pergram of carbon. Using the half-life of carbon-14, 5700 yr,calculate the age of the charcoal sample.

The given data is as follows: Amount of CaCO3=788 mgRadioactivity=1.5×10-2 BqNo. of…

Answered: Charcoal samples from Stonehenge in…

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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Charcoal samples from Stonehenge in England were
burned in O₂, and the resultant CO₂ gas bubbled into a
solution of Ca(OH)₂ (limewater), resulting in the precipitation
of CaCO₃. The CaCO₃ was removed by filtration and
dried. A 788-mg sample of the CaCO₃ had a radioactivity
of 1.5x 10^-2 Bq due to carbon-14. By comparison, living
organisms undergo 15.3 disintegrations per minute per
gram of carbon. Using the half-life of carbon-14, 5700 yr,
calculate the age of the charcoal sample.

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