Mathematics, 07.10.2019 18:20 zylisebell635
Aliving specimen in equilibrium with the atmosphere contains one atom of 14c (half-life = 5730 yr) for every 7.7 ✕ 1011 stable carbon atoms. an archeological sample of wood (cellulose, c12h22o11) contains 22.2 mg of carbon. when the sample is placed inside a shielded beta counter with 88.0% counting efficiency, 811 counts are accumulated in one week. assuming that the cosmic-ray flux and the earth's atmosphere have not changed appreciably since the sample was formed, find the age of the sample.
Answers: 3
Mathematics, 20.06.2019 18:04
Avery has saved $295 to spend on christmas gifts for 11 people. which is the best estimate of the amount he can spend for each person?
Answers: 1
Mathematics, 21.06.2019 21:00
List x1, x2, x3, x4 where xi is the midpoint endpoint of the five equal intervals used to estimate the area under the curve of f(x) between x = 0 and x = 10.
Answers: 1
Aliving specimen in equilibrium with the atmosphere contains one atom of 14c (half-life = 5730 yr) f...
Social Studies, 04.04.2020 05:15
Mathematics, 04.04.2020 05:16