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A 4-m-wide road sign oscillates heavily in a 15-km/h crosswind. To study the problem a 1/20-scale model was placed in the water-tunnel. Estimate the watertunnel speed if both the Reynolds number and the Strouhal number must be kept the same (at 0.2) as in full scale, as well as the oscillation frequency. (Use fluid properties from Table 1.1.)
a large power plant requires two pumps in the circulating water system. each pump is rated at 515 m3min when producing
A drag force meter is used to estimate the wind velocity during a hurricane. A force of 4.8 N is measured by the meter and the meter has a cross sectional area of 16.9 cm2 with a coefficient of drag of 0.66. What is the wind velocity in mph? Let the ..
Calculate the reactions Derive equations for shear and moment Draw the complete shearing force and moment diagrams,
Calculate the natural frequencies and mode shapes of a shaft in torsion of shear modulus G, length l, polar inertia J, and density ρ that is free at x = 0 and connected to a disk of inertia J0 at x = l.
a mass of 13 g oxygen fills a weighted piston-cylinder device at 32 kpa and 150 degrees celsius. the device is now
assuming that the diameters of 1000 brass plugs taken consecutively from a machine form a normal distribution with
nitrogen initially occupying 3.5 ft3 at 87 psia 480degf undergoes in internally reversible expansion during which pv1.2
a horizontal cylinder is separated into two sections by an adiabatic frictionless piston. one section contains 0.2 m3
Assume that the power, required to drive a fan is a function of the fan diameter, D, the air density, ρ, the rotational speed,ω, and the flow rate, Q. Use D, ω, and ρ as repeating variables to determine a suitable set of pi terms.
a block weighing 100 lbf sits on a 20ordm inclined surface. the coefficients of static and dynamic kinetic friction are
A uniform cantilever is 4 m long and carries a concentrated load of 40 kN at a point 3 m from the support. Determine the vertical deflection of the free end of the cantilever if EI = 65 MN m2
air at 200 kpa and 950 k enters an adiabatic nozzle at low velocity and is discharged at a pressure of 80 kpa. if the
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