Radioactive isotopes have widespread applications outside of medicine, particularly in industry and engineering.
Describe one way a radioactive isotope is used as an industrial tracer to locate a leak in an underground pipe, and one way a radioactive isotope is used in a thickness monitoring system for manufacturing metal sheets.
In your answer, you should explain how the physical properties (such as half-life, penetrating power, and ionizing power) of the chosen isotopes make them suitable for each specific application.