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A wall is 2m high by 3m wide and 20cm thick. It is made of a material with a k=.5 w/m(k). A temperature difference of 60 degrees C is imposed on the two surface. Find the rate of heat transfer and if the outer surface is at 90 degrees and the is are is moving, what is the rate of heat transfer from the outer surface to surrounding air at 25 degrees C( assume h= 10 W/m^2 C)
if you measured the time it takes for the construction elevator to go from a to b the b to c and then c to d and you
a cylinder of metal that is originally 100mm tall and 50mm in diameter must be open die forged to a height if 50mm. the
a uniform cylinder with mass m 13kg and radius r is pulled from rest along level ground by a constant force f that
While jogging on the beach (it's a warm summer day, about 30 deg C) a high-speed jet flies overhead. You guesstimate it's an altitude of about 3500 m, and count off about 5 s before you hear it. Estimate the speed and Mach number of the jet.
What is the maximum allowable pressure if a factor of safety of 4 is to be used and what pressure would a strain of 40 pc indicate?
air enters a tank through an area of 0.2 ft2 with a velocity of 15 fts and a density of 0.03 slugft3. air leaves with a
a ship channel has a depth of 16 m and an upper width of 16 m. the sides of the channel are curved such that the width
a diffuser is a device that the flow of air in order to recover a pressure loss. for the diffuser shown in the attached
two kilograms of steam at 300 kpa and a quality of 75 are heated in a closed container until a pressure of 600 kpa is
your friend a 75 kg mountain climber is suspended from a cliff by a rope. calculate the tension in the rope in newtons
a 2.2 lb steel pot contains 2.2lb of liquid water both t59 degrees f. the water is heated to to boiling point of water
air undergoes a isentropic compression in a piston-cylinder assembly from p1- 1atm t1 70 f to p2 5 atm. assuming air
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