There are two mercury barometers at the mountain. At the top reads 500 mm and at the base reads 650 mm. Determine the height (in meters) of the mountain. Note: the specific weight of air is 12 N/m^3 and the specific gravity of mercury is 13.6

6. Freshwater and seawater flowing in parallel horizontal pipelines are connected to each other by a double U-tube manometer, as shown in figure. Determine the pressure difference Pfresh water- Psea water= ?(kPa) between the two pipelines. Take the density of seawater at that location to be P = 1035 kg/m³. (2 decimal)

7. At ground level the atmospheric pressure is 101.325 kPa at 15 °C. Calculate the pressure at a point 6500 m above the ground, assuming (a) no density variation, (b) an isothermal variation of density with pressure. 8. If the barometer reads 750 mm of mercury, what absolute pressure corresponds to a gage pressure of 130 kPa? 9. Determine the absolute pressure corresponding to a vacuum of 20 cm of mercury when the barometer reads 745 mm of mercury. 10. If the pressure in a gas tank is 2.50 atmospheres, find the pressure in kPa and the pressure head in meter of water. 11. The gage pressure at the suction side of a pump shows a vacuum of 25 cm of mercury. Compute (a) pressure head in meter of water, (b) pressure in kPa, (c) absolute pressure in kPa if the barometer reads 750 mm of mercury. 12. The pressure of the air inside a tank containing air and water is 20 kPa absolute. Determine the gage pressure at a point 1.5 m below the water surface. Assume standard atmospheric pressure.

Problem 1.2 Two water tanks are connected to each other through a mercury manometer with inclined tubes as shown in figure. The value of theta is degree. (Take g=9.81 m/s²) Water (p.= 1000 kg/m³) Tank A P=20 kPa Tank B P = 40 kPa Mercury (P = 13600 kg/m³) 26.8 cm