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A long cylindrical electrical heating element of diameter D=10mm, thermal conductivity k=240 W/mC, density =2700 kg/m^3 and specific heat c_p=900J/kgC is installed in a duct for which air flows in a cross flow over the heater at a temperature and velocity of 27C and 10m/s, respectively. Assume the heater surface temperature in a uniform, and neglect radiation. The heating element dissipates energy at a rate of 1000 W/m. Evaluate air thermal properties at 450K. Using the Hilpret correlation, determine the steady state wire surface temperature (C).
a file cabinet weighing 230lb is being pushed to the right with a horizontal force p applied a distance h from the
a can of juice consists of .06 kg of aluminum and .355 liters of liquid. consider the contents to be saturated liquid
a 6-cm-diameter horizontal water jet having a velocity of 25 ms strikes a vertical stationary plate. the water
the position of a particle along a straight line is given by s1.5t3 - 13.5t2 22.5t ft where t is in seconds. determine
a heater is required to supply the domestic hot water dhw in a 50 unit apartment building where the dhw load is
three pieces of plywood are held together by a couple of washers one on each side of the plywood pieces and a steel
1. calculate the specific volume of carbon dioxide 10 degrees celsius and 80 quality?2. calculate the specific volume
find the transfer function for the following impulse responsefind the transfer function for the following impulse
steam enters an adiabatic turbine at 3 mpa and 350 celsius and leaves the turbine at 75 kpa with a quality of 89. if
Two forces are applied to the pipe AB as shown. Knowing that the pipe has inner and outer diameters equal to 35 mm and 42 mm, respectively, determine the normal and shearing stresses at (a) point a, and (b) point b
an irregularly shaped object weighs 100 lb in air and 64 lb when fully submerged in water. determine the volume and
the change in diameter 2.5 in. of a large steel bolt is carefully measured as the nut is tightened. knowing that e 29 x
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