Answer: Industrial Radioactivity. Radioisotopes are used
Chapter 43, Problem 43.71(choose chapter or problem)
Industrial Radioactivity. Radioisotopes are used in a variety of manufacturing and testing techniques. Wear measurements can be made using the following method. An automobile engine is produced using piston rings with a total mass of 100 g, which includes \(9.4 \ \mu \mathrm{Ci}\) of \(^{59}\mathrm{Fe}\) whose half-life is 45 days. The engine is test-run for 1000 hours, after which the oil is drained and its activity is measured. If the activity of the engine oil is 84 decays/s, how much mass was worn from the piston rings per hour of operation?
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