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In a certain industrial dryer 4 kg/h of water is to be removed from a moist material. The drying is accomplished by passing air over this material. Air with a dry bulb temperature of 19°C and a relative humidity of 20 percent is preheated to 50°C and passed over the moist material. It leaves with a dry bulb temperature of 40°C and a relative humidity of 80 percent. Determine the mass flow rate of dry air required for this process.
the compressor and turbine of a simple gas turbine engine each have isentropic efficiencies of 95. the compressor
water is circulating through a closed system of pipes in a two floor apartment. on the first floor the water has a
a piston- cylinder assembly with initial volume of 80 liters contains 4kg of r-134a at a pressure of 160 kpa state 1.
a missile with a conical nose cone with a semivertex angle of 16 deg is flying through sea level air at a speed of 817
distillation of multicomponent alcohol mixture. a feed of 30 mol methanol a 20 ethanol b 15 n-propanol c and 35
the 0.5m long container shown in the figure accelerates downhill so that the liquid surface is parallel to the road. a
the decision at hand is replacing the high grade muffler system with one made with low grade cheaper materials. the
an aluminum cube initially at 400oc with a dimension of 2 cm on each side is cooled using 30oc air with a convection
what is the change of internal energy and enthalpy of 4 kg nitrogen as it changes from 50oc and 100kpa to 100oc and
saturated steam at 2 mpa is contained in a piston-cylinder device. the initial volume is 0.25 cubic meters. heat is
the free convection heat transfer coefficient on a thin hot vertical plate suspended in still air can be determined
At what location S will the combined moment of the weights of the man and platform about point B be zero?
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