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Mechanical laboratory methods; the testing of instruments and machines in the mechanical engineering laboratory and in practice (1922)

Smallwood, Julian Chase · New York, D. Van Nostrand company · leaf 113

An illustration from Mechanical laboratory methods; the testing of instruments and machines in the mechanical engineering laboratory and in practice, 1922, leaf 113 — Fig. 57 shows a weir, the height of the water level above the sill being represented by H. The pressure to which the particles of water at the sill are subjected is equal to H ft. of water. When this pressure is reduced to zero by emergence of the water into the atmosphere, the work done is WH… … 19 FLOW METERS 97 velocity in feet per second, and g the acceleration of gravity.Consequently, WH = WV2/2g and, V = V2g~H. The velocity of the particles of water at levels above the sill isless than this since they are at less pressure, and it may be shownthat the average velocity is f V or § X v…

Mechanical engineering

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