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The 60-W fan of a central heating system is to circulate air through the ducts. The analysis of the flow shows that the fan needs to raise the pressure of air by 50 Pa to maintain flow. The fan is located in a horizontal flow section whose diameter is 30 cm at both the inlet and the outlet. Determine the highest possible average flow velocity in the duct.
calculate the specific exergy for i water and ii r-134a and iii air at p 0.6 bar and t 10oc. assume to 20oc and po
Describe the four incorrect assumptions concerning robot - arm movement that are most frequently responsible for impact accidents.
a cannon ball having a weight of 20lb is fired upward in the vertical direction with a muzzle velocity of 1200 fts.
a heat pump absorbs heat from the cold outdoors at 3 c and supplies heat to a house at 20 c at a rate of 30000 kjh. if
an 8 ft3 tank contains air at an initial temperature of 80f and intial pressure of 100psi. the tank develops a small
a secondary settling tank is to be designed for a municipal wastewater treatment facility. the influent tss is 1000 mgl
at steady state a commercial freezer maintains its interior temperature of -shy30f by rejecting heat to the
A car drives on a curved road that goes down a hill. The car's position is defined by the position vector, r=(-30.0cos(pi/10.0t)]i+[30.0sin(pi/10.0t)]jâ-(Azt)k} ft where Az=7.00ft/s. The image below shows the system projected onto the x-y plane. What..
the environment in a certain area is 15 degrees c. plot the maximum efficiency of a nuclear power plant as a function
A small droplet of liquid detergent, falling through air in a spray drying tower, has its diameter reduced as water evaporates from the surface. If we assume that the temperature of the liquid within the drop remains at 290 K and the dry air is at..
liquid water at 180oc 2000 kpa is throttled into a flash evaporator chamber having a pressure of 500 kpa. neglect any
Determine if the shaft has infinite fatigue life. If not, determine the number of cycles to failure. Also determine the safety factor for first cycle yield and draw a free body diagram, shear and moment diagrams, and graph the loads on the shaft..
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