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Explain the terms, ‘ Total Pressure’, and centre of pressure’. Show that the centre of pressure and centroid coincide for a horizontally submerged plane surface. questions like this.

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Code No: RR-220301II-B.Tech. II-Semester Regular Examinations, April/May-2004MECHANICS OF FLUIDS(Common to Mechanical Engineering and Metallurgy and Material Technology) Time: 3 HoursMax. Marks: 80Answer any FIVE questionsAll questions carry equal marks- - -1.a)Explain the terms, Total Pressure, and centre of pressure. Show that the centre of pressure and centroid coincide for a horizontally submerged plane surface. b)The pressure at the centre of a pipe of diameter 3m is 30 N/cm2. The pipe contains oil of specific gravity 0.87 and is fitted with a gate valve. Find the force exerted by the oil on the gate and position of centre of pressure.2.a)State and explain the four types of displacements of a fluid particle that undergoes as it moves in a flow field. b)For the following flows, determine the components of rotation about the various axes: i) , , ii) , iii) , 3.a)Define the terms (i) Vortex flow (ii) Forced vertex flow (iii) Free vortex flow. Give suitable examples. b)A rectangular duct of width 25 cm has a two dimensional irrotational flow. It has an elbow made up of circular arcs of radius 40 cm and 65 cm for the inner and outer walls respectively. Calculate the discharge per unit width of the duct when the difference in pressure between outer and inner walls in t

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