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 10.6 m Air Water Cable Open end Steel block: 3.0 m Figure P2.144 Hint: Initially the tank is entirely filled with air at atmospheric pressure before the tank is lowered into the water which compresses the air. Ans. a. 18.9 kPa, b. 0.208 m³. Show all work.