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ENGG252 (DB225) Engineering Fluid Mechanics
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The gage pressure in a pipe is measured by a manometer containing mercury ( ). The top of the mercury is open to the atmosphere and the atmospheric pressure is 100 kPa. If the mercury column height is 57 cm, the gage pressure in the pipe is
Water is compressed from 80 kPa to 2400 kPa at constant temperature. The initial density of water is 1000 kg/m and the isothermal compressibility of water is
The surface tension of soap water at 20
The difference between the energies of a flowing and stationary fluid per unit mass of the fluid is equal to
The specific gravity of a fluid is specified to be 0.85. The specific volume of this fluid is
The density of a fluid decreases by 10 percent at constant pressure when its temperature increases by 10 C. The coefficient of volume expansion of this fluid is
A viscometer constructed of two 30-cm-long concentric cylinders is used to measure the viscosity of a fluid. The outer diameter of the inner cylinder is 9 cm, and the gap between the two cylinders is 0.18 cm.
The inner cylinder is rotated at 250 rpm, and the torque is measured to be .155 N
A 1.04-mm-diameter glass tube is inserted into water at 20°C in a cup. The surface tension of water at 20 = 0.073 N/m. The contact angle can be taken as zero degrees. The capillary rise of water in the tube is
The speed of a spacecraft is given to be 1250 km/h in atmospheric air at 25 C. The Mach number of this flow is
The dynamic viscosity of air at 20 kg/m