Homework Statement
When iodine is ingested by humans they eliminate it such that on half of the body's iodine content is execreted every 4.0 days. Radioactive 131I with a physical half-life of 8.1 days is administered to a patient. When will only 1% of the isotope remain in the patient's body...
Homework Statement
A refrigerator is operating at a C.O.P of 0.98, which is 13% of the max C.O.P theoretically possible. The temperature of the freezer compartment of the refrigerator is -12 Celsius. What is the temperature of the surrounding room (in Celsius)?
Homework Equations...