An industrial radiography company orders an 192Ir gamma source that must possess an activity of 2.00Ci on the day weld inspections are scheduled to start. Shipping, customs, and installation are expected to take 30.0days. The half-life of 192Ir is 74days.
(i) Determine the decay constant of 192Ir.
(ii) Calculate the activity the manufacturer must supply at the time of dispatch so that the source meets the required activity 30.0days later.
(iii) Find the percentage of the original nuclei that will have decayed during the shipping period.