MECHENG 2W04 Lecture Notes - Lecture 1: Thermodynamics, Pressure Measurement, Free Body Diagram
21 Jan 2015
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2w04, 2014: a gas is contained in a vertical, frictionless piston-cylinder device. The piston has a mass of 4 kg and a cross-sectional area of 35 cm2. A compressed spring above the piston exerts a force of 60 n on the piston. If the atmospheric pressure is 95 kpa, determine the absolute pressure inside the cylinder. Analysis drawing the free body diagram of the piston and balancing the vertical forces yield. 2w04, 2014: the lower half of a 10-m-high cylindrical container is filled with water ( = 1000 kg/m3) and the upper half with oil that has a specific gravity of 0. 85. Determine the pressure difference between the top and bottom of the cylinder. Properties the density of water is given to be = 1000 kg/m3. The specific gravity of oil is given to be 0. 85. Analysis the density of the oil is obtained by multiplying its specific gravity by the density of water,
