a

b

Joe donated blood yesterday, and a part of the preparation for the collection they took his blood pressure. The reading on the pressure device oscillated between 125 mm Hg (at the peak of his heartbeat) and 85 mm Hg (between heartbeats). When the pressure device was removed and measuring the room air it indicated a value of 0 mm Hg. For a normal person at sea level (air pressure = 1 atm): - What are the gauge pressures at the peak and between beats? (in atm) - What are the absolute pressures at the peak and between beats? (in atm) If the pressure at a depth of 10 ft below the surface of a stagnant liquid is 3.5 psi above atmospheric pressure, what will the pressure of the liquid be at a depth of 45 ft below the surface? Hint: Use the ratio between the two locations to help cancel out non-specified parameters