What is the pressure inside an alveolus having a radius of2.50×10−4 m if the surface tension of the fluid-lined wall isthe same as for soapy water? You may assume the pressureis the same as that created by a spherical bubble.

What is the pressure inside the drop of mercury of radius 3.00 mm at room temperature? Surface tension of mercury at that temperature (20°C) is 4.65 x 10 N m. The atmospheric pressure is 1.01 x 10° Pa. Also give the excess pressure inside the drop.

torricellian barometer consisting of an inverted tube of mercury in a dish of mercury. When the atmospheric pressure is exactly 1.00 atm, what is the gauge pressure at point B of the mercury in the tube, where h1=0.76 m and h2 = 0.57 m respectively?

Suppose you measure a standing person’s blood pressure by placing the cuff on his leg 0.525 m below the heart. For this problem, assume that there is no loss of pressure due to resistance in the circulatory system (a reasonable assumption, since major arteries are large). The density of blood is 1.05×103 kg/m3 a. Calculate the systolic pressure you would observe, in units of mm Hgmm Hg, if the pressure at the heart was 120 over 80 mm Hg. Note that the top (and greater) number is the systolic pressure. b. Calculate the diastolic pressure you would observe, in units of mm Hgmm Hg, if the pressure at the heart was 120 over 80 mm Hg. Note that the bottom (smaller) number is the diastolic pressure.