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The tension in a string holding a solid block below the surface of a liquid (of density greater than the solid) is T0when the containing vessel (see below figure) is at rest. Show that the tension T, when the vessel has an upward vertical acceleration a, is given by T0 (1+a/g).
Calculate the vertical height raised, the final angular velocity of the drum, the work done, the input torque to the driving motor and the average power developed.
steam at 1.4 mpa and 350 c enters an adiabatic turbine at a rate of 450 kgh. the turbine has an adiabatic efficiency of
air as an ideal gas is compressed from a state where the pressure is 0.1 mpa and the temperature is 27o to a state
A compressed liquid mixture of 42 mol percent n-hexane (1) and 58 mol percent ethane (2) is to be fed to a flash tank where the pressure is reduced and a liquid and vapor stream separated. The flashing operation will be carried out at 32°C.
the city of houston has a water filtration system that consists of a large rigid tank with a single 1.5m diameter inlet
A mold has a downsprue of length = 6.0 in. The cross-sectional area at the bottom of the sprue is 0.45 in2. The sprue leads into a horizontal runner which feeds the mold cavity, whose volume = 75 in3. Determine (a) the velocity of the molten metal fl..
If quenching is to occur until the surface temperature of the balls reaches 100°C, how long must the balls be kept in the oil? What is the center temperature at the conclusion of the cooling period?
what is the difference between steady state and non-steady state diffusion processes? use mathematical expressions to
Consider a flat plate mounted in the test section of a supersonic wind tunnel – assume the nozzle is perfectly expanded. The plate is at an angle of attack of -10° and the static pressure on the bottom surface of the plate is 1.0 atm. The nozzle thro..
A vapor compression refrigeration cycle has a theoretical COP of 4.8 and provides 120,000 btu/h of cooling (same as 10 tons of cooling). The compressor is driven by a motor with an efficiency of 92%. Estimate the theoretical kW electrical demand that..
Steam enters an adiabatic turbine at 5 MPa, 650°C, and 80 m/s and leaves at 50 kPa, 150°C, and 140 m/s. If the power output of the turbine is 8 MW, determine (a) the mass flow rate of the steam flowing through the turbine and (b) the isentropic effic..
block a has a mass of 3kg and is sliding ona rough horizantal surface with a velocity va12ms when it makes a direct
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