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A pressure filter of the tank type is to be used. How many square feet of filter surface are needed to give 1400 gal of filtrate in a I-h filtration? The viscosity is that of water at 70°F. 30.8. The filter of Prob. 30.7 is washed at 70°F and 70IbJ/in.' with a volume of wash water equal to one-third that of the filtrate. The washing rate j~ 85 percent of the theoretical value. How long should it take to wash the cake?
a mass of 12kg of saturated refrigerant-134a vapor is contained in a frictionless piston-cylinder device at 240kpa. now
On a unit surface area basis, determine the rate of heat transfer into and out of the wall and the rate of change of energy stored by the wall.
a piston-cylinder device containing carbon-dioxide gas undergoes an isobaric process from 15 psia and 80of to 200of.
Design an aluminum cantilever beam section on which the force is applied to withstand impact movement up and down 3.0 inches off the ground and back for a life of 8(104) cycles.
a 40kn axial load is applied to a short wooden post that is supported by a concrete footing resting on undisturbed
consider 100 kg of steam initially at 20 bar and 240 degrees c as the system. determine the change in exergy in kj for
Refrigerant 134a flows at steady state through a horizontal tube with inner diameter of 0.05 m. The refrigerant enters the tube with a quality of 0.1, temperature of 36 C, and velocity of 10 m/s. The refrigerant exits the tube at 9 bar as a saturated..
Water in thermal equilibrium with a 50 C plate flows across the plate at a velocity of 0.5 m/s. find the length of the plate required such that the critical Reynolds number is achieved at the trailing edge of the plate.
A radiator surface on a spacecraft is sized to deliver 1000 W heat load to deep space where the sink temperature is assumed to be 10 K. the radiator surface is 10 m x 1 m and has a solar abosrptance of 0.2 and an emissivity of 0.8. Determine the surf..
Air flows steadily through a one-inlet, one-exit control volume. At the inlet, which has a flow area of 28 cm2, the air is at 600 kPa, 500 K, and has velocity of 30 m/s. At the exit, the pressure is 300 kPa, the temperature is 456.5 K, and the veloci..
A mason stretches a string between two points 50 ft apart on the same level with a tension of 10 lb at each end. If the string weighs 0.1 lb, determine the sag h at the middle of the string.
refrigerant 134a at -10degc 1.4 bar and a mass flow rate of 280 kghr enters an insulated compressor operating at steady
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