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A building for which the heat transfer rate through the walls and roof is 1400 Btu/h per degree temperature difference between the inside and outside is to be maintained at 68oF. For a day when the outside temperature is 38oF, determine the power required at steady state, in hp, to heat the building using electrical resistance elements and compare with the minimum theoretical power that would be required by a heat pump.
for a flow in the xy plane the x component of velocity is given by u ax2y2 where a 0.3 m-3s-1 and x and y are
Wheel of radius r is driven by an arm OA. It is driving (without slip) wheel of a radius r2 which is fixed to a drum of radius r1. Load G is attached to the rope which winds on the drum. Calculate the speed of load G if the arm OA moves at n rev/m..
a natural gas methane pipeline is to be designed to transport the gas at a rate of 50000 scfm. the pipe is to be 6
a commercial steel pipline is to convey 20 ft3s of water at 68 f between two reservoirs 5 miles and 200 feet different
danica traveling at a speed of 200 kmhr on a straight road applies brakes to her car at point a and reduces her speed
a container with volume 213 cubic cm is heated and allowed to expand to 1.44 times the original volume. as the
a 100-mm long and 20-mm diameter rod of 403-stainless steel is pulled to fracture with reported results as follows
why do we not take into account the normal forces or the frictional forces acting on the jumper when determining the
solid particles having a size of 0.18 mm a sphericity shape factor of 0.91 and a density of 1090 kgm3 are to be
5 kg of steam contained within a piston-cylinder assembly undergoes an expansion from state 1 where the specific
a hot air ballon is traveling upward at a velocity of 10.94 fts and at a horizontal velocity of 18.23 fts. if sand bag
an object whose mass is 50lb is projected upward from the surface of the earth with an intial velocity of 200 fts. the
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