1. A slab of ice floats on a freshwater lake. For a woman to be able to stand on it without getting her feet wet, the minimum volume the slab needed is 0.75m³. What is the mass of the woman?

2. A medical technician is trying to determine what percentage of a patient's artery is blocked by plaque. To accomplish this, she measures the blood pressure just before the region of blockage and finds that it is 1.2010⁴ Pa , while in the region of blockage it is 1.1210⁴ Pa . Furthermore, she knows that blood flowing through the normal artery just before the point of blockage is traveling at 20.0 cm/s , and the specific gravity of this patient's blood is 1.06. What percentage of the cross-sectional area of the patient's artery is blocked by the plaque?