1. a) Explain what is meant by the terms hydrostatic pressure and hydrodynamic pressure?
b) Which of these terms can be used when discussing cardiac output?
2. A radioactive isotope, used in the agricultural industry has a half life of 8 days. On application, the radiation is emitted is measured at 12500 counts per sec (cps). If the area that it is applied to cannot be used until the radiation strength is less than 50 cps how long will it take before the site can be used again? (Hint assume initial strength is 100%)