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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.)
For the following combinations, determine the temp drop through the wall (a) thickness 0.16m and k= 1.4, 15, 25, 45, 210 and 340 W/mK. (ii) Thickness 0.25m and k as above. Plot the temperature drop against the radio (L/k) and also (k/L).
Develop an algebraic expression for the viscosity of the liquid in the device in terms of M, g, Vm, r, R, a, and H. Evaluate the viscosity of the liquid using: M = 0.10 kg r = 25 mm R = 50 mm a = 0.20 mm H = 80 mm Vm = 30 mm/s
sea-level air is drawn from the atmosphere through a duct and into a vacuum tank. if the air remains a perfect gas at
During a certain activity, a hinged knee prosthesis (material is CoCr - Endurance Strength = 330 MPa) is subjected to a cyclically varying bending moment with a mean value of 0 N mm.
the steel bolt and anchor assembly is used to reinforce the roof of a passageway in an underground coal mine. in
it has been calculated that the critical point in a 4340 steel part is subject to a state of stress in with signma x is
The final pressure of the system is 20.0 psia. Calculate the amount of heat transferred and indicate its direction.
a 4cm outer diameter and 3cm inner diameter circular shaft supports a 200n load and is supported at two points which
a rigid insulated tank that is initially evacuated is connected through a valve to a supply line that carries helium at
Determine the magnitude of the horizontal and vertical components of the force of the water on the gate.
Design Problem - Piston and Flywheel : Analyze the motion of the crankshaft AB and flywheel for 0 ≤ θ ≤ 4Π (two complete rotations of the crankshaft, or all four cycles, beginning and ending at TDC), for different values of the four design paramete..
Refrigerant 134a exits a heat exchanger through 0.75 inch diameter tubing with a mass flow rate of 0.9 lb/s. The temperature and quality of the refrigerant are -15 degrees Fahrenheit and 0.05 respectively. Determine the velocity of the refrigerant, i..
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