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Sitting on the deck one evening. watching for that pesky bunny, jon and his brother see a twig floating down from an aspen tree. (wait - os that a bunny ?) they wonder just what the boundary layer looks like on the twig.
A) Considering that the flow is noraml to the cylindrical - like twig, sketch this boundary layer on the twig. Explain the key physical concepts to the puups.
B) how does the nature of the boundary layer affect lift and frag on the twig?
C) what types of drag are acting on the twig?
D) how would a sudden thunderstorm ( strong wind, rain, hall)) affect the drag ?
The coefficient of volume compressibility is 4x10-4 m2/kN at the ground surface and the reduction in the coefficient of volume compressibility with depth equals depth*0.1*10-4 m2/kN.
A large steel tower is to be supported by a series of steel wires; it is estimated that the load on each wire will be 19,000N. Determine the minimum required wire diameter assuming a factor of safety 5
Specify a device describing briefly its principle of operation, that is typically installed downstream of a bursting disc as an indicator of disc rupture,
A dairy that processes about 250,000 lb of milk daily produces an average of 65,100 gpd of wastewater with a BOD of 1400 mg/L. The principal opearations are bottling milk and maing ice cream with limited produciton of cottage cheese.
A CMFR is to be designed to remove contaminant A from water with a steady-state efficiency of 95 percent. The decay reaction is zeroth order, with a rate constant of 0.1M/h. The inlet concentration of A is 0.5 M.
if you had a choice of three kinds of aggregate--a sandstone,a crushed basalt,and a quartizite,you may select the basalt.Give one possible characteristic or property of sanstone and of the quartzite that made you decide not to select it for your c..
A toll bridge carries 5000 vehicles per day when the toll is $1.50/vehicle. It is estimated that when the toll is increased by 25 cents, the traffic on the bridge will decline by 10% of the current volume.
A 2 L jar, equipped with a tight-fitting lid that contains a rubber septum, is half filled with water. At equilibrium, the air space has a volume of 1 L, a total pressure of 1 atm, and a temperature of 298 K.
A flat broad-crested regular step dam with a drop of 2 m is situated on a grossly polluted stretch of river below a sewage outfall plant. The river is located at an elevation of 2 km.
What volume of CO would a 5-mile trip produce after the gas coolsto 25°C (at 1 atm) and per meter of distance traveled, what volume of air could be polluted to the air quality standard of 9ppm
Which of the following is not a basic systems engineering concept?a. Define need before function
The hinge at A and the cable that attaches at points B and C support rigid bar ABC. Determine the reaction components at A and the tension in the cable.
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