In a dry-pipe sprinkler valve, the air seat typically has a surface area on which the air pressure acts six times as large as the water seat upon which the water pressure acts. If the water pressure is 105 psi, what air pressure is required to attain a state of equilibrium? answer should be in ( psi )

The spherical gas tank is fabricated by bolting together two hemispherical thin shells of thickness 30 mm. The gas contained in the tank is under a gauge pressure of 2.5 MPa. If the tank has an inner diameter of 8 m and is sealed with 900 bolts each 20 mm in diameter, determine the internal force carried by each bolt.

A pressure versus volume (pV) diagram for a system is shown in the figure. The arrows of the curve indicate the direction of the process, and the points of interest are labeled. The values for the points in the diagram are shown in the table. Volume (m³) Pressure (Pa) 2 Vo = 27.8 po = 1.37 × 10ª Vi = 20.8 Pi = 1.37 × 104 V2 = 17.4 P2 = 6.18 × 10³ V3 = 13.9 P3 = 6.18 × 10³ V4 = 13.9 P4 = 2.64 x 103 Vs = 8.87 p5 = 1.00 x 10³ Volume (m) Calculate the amount of work done on the system from 0–2 (Wm) and then for the entire curve from 0-5 (Wos). Pressure (Pa)

The figure below shows a gas contained in a vertical piston–cylinder assembly. A vertical shaft whose cross-sectional area is 0.8 cm2 is attached to the top of the piston. Determine the magnitude, F, of the force acting on the shaft, in N, required if the gas pressure is 3 bar. The masses of the piston and attached shaft are 24.5 kg and 0.5 kg, respectively. The piston diameter is D = 10 cm. The local atmospheric pressure is 1 bar. The piston moves smoothly in the cylinder and g = 9.81 m/s2.