A 5x8 ft sheet of plywood weighting 40 lb has been temporaarily plced among three pipe suports. the lower edge of teh sheet rests on small collars at A and B and its upper edge leans against pipe C. neglecting friction at all surfaces, determine the following a) draw fbd clearly label al the forces with their names b) find the reaction force at c by summing total moment about z-axis. c) find reaction Ay by summing up total moment about bx. d) write down the equation of total moment about Ay axis, then find Bx e) find by summing up all forces in the y-direction

Asimple rankine cycle uses water as the working fluid. the water enters the turbine at 10 mpa and 480c while the condenser operates at 6 kpa. if the turbine has an isentropic efficiency of 80 percent while the pump has an isentropic efficiency of 70 percent determine the thermal efficiency

Along 8-cm diameter steam pipe whose external surface temperature is 900c connects two buildings. the pipe is exposed to ambient air at 70c with a wind speed of 50 km/hr blowing across the pipe. determine the heat loss from the pipe per unit length. (b) air at 500c enters a section of a rectangular duct (15 cm x 20 cm) at an average velocity of 7 m/s. if the walls of the duct are maintained at 100c. a) the length of the tube for an exit temperature of the air to be 40 0c. b)the rate of heat transfer from the air. c) the fan power needed to overcome the pressure drop in this section of the duct.

Water vapor initially at 10 bar and 400 °c is contained within a piston-cylinder assembly. the water lost heat to the surrounding according to isochoric (iso-volumetric) process until its temperature is 150 °c. the water is then condensed isothermally to saturated liquid. for the water as a system, calculate the work in kj/kg