# HW3 - Middle East Technical University Department of...

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Middle East Technical University Department of Chemical Engineering ChE 222 – Fluid Mechanics March 3, 2011 Homework III (Due March 10, 2011) 1. Using the defined constants and conversion factors for mass, length, time and temperature, calculate conversion factors for a) 1 lb f /in 2 to kPa b) 1 Watt to lb f -ft/s c) 1 Hp to kW d) 1 gal/h to ft 3 /s and m 3 /s 2. Find the value of ideal gas constant R using ideal gas law in terms of the following units, a) psia. ft 3 / lbmol. o R b) kPa. m 3 / kgmol. K c) J / kgmol. K 3. Determine the density of air under a vacuum of 440 mmHg at -40 o C if the atmospheric pressure is 750 mmHg. 4. The figure below (Fig.1) shows a weir which is set at an angle of 50 o from the horizontal line. The weir is 6 m long and 5 m wide, and has water up to its top. What is the force exerted by water on the weir due to hydrostatic pressure? Determine the x and y-components of the resultant force.

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## This note was uploaded on 03/05/2012 for the course CHE 222 taught by Professor Tülayözbelge during the Spring '12 term at Middle East Technical University.

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HW3 - Middle East Technical University Department of...

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