1. A normal blood pressure reading is less than 120/80 where both numbers are gauge pressures measured in millimeters of mercury (mmHg). What are the absolute and gauge pressures in pascals at the base of a 0.0900 m column of mercury? (The density of mercury is ????Hg = 13.6 ? 103 kg/m3. Assume the system is at sea level.)
(a)absolute pressure (Enter your answer to at least three significant figures.)_______ Pa
(b) gauge pressure (Enter your answer to at least two significant figures.)_______Pa
2. Assume that if the shear stress in steel exceeds about 4.00 108 N/m2, the steel ruptures.
(a) Determine the shearing force necessary to shear a steel bolt 1.20 cm in diameter._______ N
(b) Determine the shearing force necessary to punch a 1.75-cm-diameter hole in a steel plate 0.600 cm thick.______N