On your birthday, you measure the activity of a sample of 210Bi, which has a half-life of 5.01 days. The activity you measure is 1.000 μCi. What is the activity of this sample on your next birthday? (a) 1.000 μCi (b) 0 (c) ~0.2 μCi (d) ~0.01 μCi (e) ~10-22 μCi

Gamma rays may be used to kill pathogens in ground beef. One irradiation facility uses a 60Co source that has an activity of 1.0×10^6Ci. 60Co undergoes beta decay and then gives off two gamma rays, at 1.17 and 1.33MeV; typically 30% of this gamma-ray energy is absorbed by the meat. The dose required to kill all pathogens present in the beef is 4000Gy.   How many kilograms of meat per hour can be processed in this facility? Express your answer in kilograms per h

An unlabeled container of radioactive material has an activity of 78 decays/min. Four days later the activity is 63 decays/min. A. Determine the half-life of the material. T = ? days B. How many days after the activity is 78 decays/min will it reach 10 decays/min? t = ? days

The activity of C-14 can be used to determine the age of some archaeological discoveries. Suppose a sample of ancient wood which contains C-14 has an activity of 7.50 x 10^-4 Ci. The half life of C-14 is 5730 years. What will be the activity of this sample after 250 years?