3-26 The basic barometer can be used to measure the height of a building. If the barometric readings at the top and at the bottom of a building are 730 and 755 mmHg, respectively, determine the height of the building. Assume an average air density of 1.18 kg/m3.
Solution: Below is the solution of this problem. you can download the solution. Get Problem Solutions
3-15 The absolute pressure in water at a depth of 8 m is read to be 175 kPa. Determine (a) the local atmospheric pressure, and (b) the absolute pressure at a depth of 8 m in a liquid whose specific gravity is 0.78 at the same location.
Solution: Below is the solution of this problem. you can download the solution. Get Problem Solutions
3-12 The water in a tank is pressurized by air, and the pressure is measured by a multifluid manometer as shown in Fig. P3-12. Determine the gage pressure of air in the tank if h1 = 0.4 m, h2 = 0.6 m, and h = 0.8 m. Take the densities of water, oil, and mercury to be 1000 kg/m3, 850 kg/m3, and 13,600 kg/m3, respectively.
Solution: Below is the solution of this problem. you can download the solution. Get Problem Solutions
3-11E A manometer is used to measure the air pressure in a tank. The fluid used has a specific gravity of 1.25, and the differential height between the two arms of the manometer is 28 in. If the local atmospheric pressure is 12.7 psia, determine the absolute pressure in the tank for the cases of the manometer arm with the (a) higher and (b) lower fluid level being attached to the tank.
Solution: Below is the solution of this problem. you can download the solution. Get Problem Solutions
3-8 A vacuum gage connected to a chamber reads 36 kPa at a location where the atmospheric pressure is 92 kPa. Determine the absolute pressure in the chamber.
Solution: Below is the solution of this problem. you can download the solution. Get Problem Solutions
3-7 The piston of a vertical piston-cylinder device containing a gas has a mass of 40 kg and a cross-sectional area of 0.012 m2 (Fig P3-7). The local atmospheric pressure is 95 kPa, and the gravitational acceleration is 9.81 m/s2. (a) Determine the pressure inside the cylinder. (b) If some heat is transferred to the gas and its volume is doubled, do you expect the pressure inside the cylinder to change?
Solution: Below is the solution of this problem. you can download the solution. Get Problem Solutions
