(D)An oil pipeline and a 1.3-m' rigid air tank are connected to each other by a...

  

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(D)An oil pipeline and a 1.3-m' rigid air tank are connected to each other by a manometer, as shown in the Figure below. If the tank contains 15 kg of air at 80°C, determine: • the absolute pressure in the pipeline and • the change in Ah when the temperature in the tank drops to 20°C. Assume the pressure in the oil pipeline to remain constant, and the air volume in the manometer to be negligible relative to the volume of the tank. Oil SG = 2.68 1.3 m Air. 80°C h = 75 cm Ah = 20 cm 3D D=4 mm Mercury SG = 13.6 50° FIGURE P3-149 (D)An oil pipeline and a 1.3-m' rigid air tank are connected to each other by a manometer, as shown in the Figure below. If the tank contains 15 kg of air at 80°C, determine: • the absolute pressure in the pipeline and • the change in Ah when the temperature in the tank drops to 20°C. Assume the pressure in the oil pipeline to remain constant, and the air volume in the manometer to be negligible relative to the volume of the tank. Oil SG = 2.68 1.3 m Air. 80°C h = 75 cm Ah = 20 cm 3D D=4 mm Mercury SG = 13.6 50° FIGURE P3-149