2.144 The thin-walled, 1-m-diameter tank of Fig. P2.144 is closed at one end and has a mass of 90 kg. The open end of the tank is lowered into the water and held in the position shown by a steel block having a density of 7840 kg/m³. Assume that the air that is trapped in the tank is compressed at a constant temperature. De- termine: (a) the reading on the pressure gage at the top of the tank, and (b) the volume of the steel block. Tank 0.6 m Air Water -Cable Open end- Steel block Figure P2.144 3.0 m