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The electric reheating oven is used to heat a continuous sheet of metal from 25-1000C The metal speed is such that the strip of metal spends 2 hours inside this oven, The sheet thickness is 1cm and the ambient temperature is 25C with the temperature of the outside of the oven a uniform 50C. Inside the oven use a h_convection= 20 W/ m^2*K and the metal sheet is 304 ss. Calculate the electric power input to the oven per unit oven width; q'. What percentage of this power is lost by convection to the outside air?
the 2007 bmw z4 coupe 3.0si can accelerate from 0 to 59 mph in 5 s and its maximum speed is 152 mph. assuming the car
1. a natural gas engine has a bsfc of 9000 btushp-hour when producing 200 horsepower. how many btus per hour does the
a centrifugal compressor delivers 20 kgs of air at 0.32 mnm2 when running at 17500 rpm and absorbing 2800 kw. the inlet
a piston-cylinder contains nitrogen at a temperature of 50 degc a pressure of 500 kpa and a volume of 10 liters. a
a storage tank is 40 feet above a river. water is pumped from the river to the storage tank at a rate of 0.095m3s. the
air at t11300 0r p116 lbfin2 enters a counterflow heat exchanger operating at steady state and exits at p214.7 lbfin2.
what is the rotation matrix for an object rotation of 30o around the z axis followed by 60o around the x axis and followed by a rotation of the y axis. all rotations are counter clockwise.
Assume the same eight features are used to assess quality
determine head loss and the power required to overcome it given efficiency 73 power of the pump 12hp height 35ft water
consider a large plane wall of thickness l 0. 5 m. the wall surface at x 0 is insulated while the surface at x l is
1 air at the inlet of a nozzle is at 500 kpa 42.2oc and a velocity of 87 ms. the nozzle exit pressure is at 132 kpa.
a pile weighing 2000 lb is driven vertically into the ground by a pile-driver hammer weighing 6000 lb which falls
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