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# Consider a square flat plate at zero incidence angle to a low-speed incompressible flow. the length of each side is 4 m. assume that the transition reynolds number is 5 × 105 and that the free-stream properties are those at standard sea level. calculate the friction drag on the flat plate when the free-stream velocity is (a) 20 m/s and when it is (b) 40 m/s. (c) assuming that the friction drag, df, varies with velocity as , calculate the value of the exponent n based on the answers from (a) and (b). how close does n come to 2? that is, how close is the friction drag to obeying the velocity squared law? ### Another question on Engineering Engineering, 03.07.2019 12:20
The y form of iron is known as: a) ferrite b) cementite c) perlite d) austenite Engineering, 03.07.2019 12:20
Amass of m 1.5 kg of steam is contained in a closed rigid container. initially the pressure and temperature of the steam are: p 1.5 mpa and t 240°c (superheated state), respectively. then the temperature drops to t2= 100°c as the result of heat transfer to the surroundings. determine: a) quality of the steam at the end of the process, b) heat transfer with the surroundings. for: p1.5 mpa and t 240°c: enthalpy of superheated vapour is 2900 kj/kg, specific volume of superheated vapour is 0. 1483 m/kg, while for t 100°c: enthalpy of saturated liquid water is 419kj/kg, specific volume of saturated liquid water is 0.001043m/kg, enthalpy of saturated vapour is 2676 kj/kg, specific volume of saturated vapour is 1.672 m/kg and pressure is 0.1 mpa. Engineering, 03.07.2019 12:30
Ahouse has the following electrical appliance usage (1) single 40w lamp used for 4 hours per day (2) single 60w fan used for 12 hours per day (3) single 200w refrigerator that runs 24 hours per day with compressor run 12 hours and off 12 hours find the solar power inverter size in watt with correction factor of 1.25. Engineering, 03.07.2019 12:30
Apiston-cylinder with a volume of 0.25 m3 holds 1 kg of air (r 0.287 k/kgk) at a temperature of 100 c. heat transfer to the cylinder causes an isothermal expansion of the piston until the volume triples. how much heat is added to the piston-cylinder?
Consider a square flat plate at zero incidence angle to a low-speed incompressible flow. the length...
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