The helium-filled blimp shown in the figure below is used at various athletic events. Determine the number of pounds of helium (Ibm) within it if its volume is 68,000 ft and the temperature and pressure are 80 °F and 14.2 psia, respectively. The gas constant for helium s 1.242x10 (ft-b;)/(slug-R).

Q1/ The helium-filled blimp shown in Fig. A is used at various athletic events. Determine the number of pounds of helium within it if its volume is 1950 m and the temperature and pressure are 26 °C and 14.2 psia, respectively. Fig. A

H.W.1/: The water in a tank is pressurized by air, and the pressure is measured by a multifluid manometer as shown in Fig. below. Determine the gage pressure of air in the tank if hl = 0.4 m, h2 = 0.6 m, and h3 = 0.8 m. Take the densities of water, oil, and mercury to be 1000 kg/m³, 850 kg/m³, and 13600 kg/m3, respectively? Oil Air Water IT h2 h3 Mercury

Bathyscaphes are capable of submerging to great depths in the ocean. What is the pressure at a depth of 5 km, assuming sea water has a constant specific weight of 10.1 kN m-³? Express your answer in kilopascals. The bathyscaphe contains several ballast tanks to regulate its buoyancy. If the dry mass of the bathyscaphe is 800 kg and its volume is 15 m³, the ballast tanks must contain what volume of seawater for the bathyscaphe to begin to sink? LF