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Exhaust (assumed to have the properties of standard air) leaves the 4-ft-diameter chimney shown in Fig. with a velocity of 6 ft/s. Because of the wind, after a few diameters downstream the exhaust flows in a horizontal direction with the speed of the wind, 15 ft/s. Determine the horizontal component of the force that the blowing wind puts on the exhaust gases.
an elevator having a weight of 500 lb needs to be lifted a distance y 20ft starting from rest and then stopping after
argon gas flows through a rigid nozzle at steady-state-steady flow. the inlet flow velocity is small. the gas exits the
Air enters an adiabatic nozzle steadily at 300 kPa, 200oC, and 30 m/s and leaves at 100 kPa and 180 m/s. The inlet area of the nozzle is 80 cm2. Determine Mass flow rate of air through the nozzle.
Consider a piston/cylinder with .5kg of R-134a as saturated vapor at -10C. It is now compressed to a pressure of 500kPa in a polytrophic process with n=1.5. Find the final volume an temperature and determine the work done during the process?
Beginning with an appropriate differential control volume, obtain an equation that could be used to determine the mean air temperature Tm(x) as a function of distance along the channel. Solve this equation to obtain an expression for the mean temp..
carbon dioxide co gas initially at t1 530 r p1 15 lbfin2 and v1 1 ft3 is compressed in a piston-cylinder assembly.
A jet of water issues from a nozzle at a speed of 6 m/s and strikes a stationary flat plate oriented normal to the jet, as shown in Figure 1. The exit area of the nozzle is 645 mm2. Ignore friction losses and assume all pressures are atmospheric (zer..
Determine the percentage of each component of product and write down the stoichiometric and actual combustion equations of the fuel/air mixture.
A living plant leaf is an open system that exchanges energy (sunlight and thermal flows) + matter (O2, CO2, water vapor, etc.) with the surroundings (the exterior). Even with irreversible processes (energy dissipation) we find that the net entropy ch..
A piston-cylinder device contains helium gas initially at 145 kPa, 20 degrees C, and 0.5 m^3. The helium is now compressed in a polytropic process (PV^n = constant) to 400 kPa and 140 degrees C. Determine the heat loss or gain during this process.
to conserve water and energy a flow reducer is installed in the shower head shown here. if the pressure at point 1
A system consisting of 1kg of H2O undergoes a cycle composed of the following closed processes:
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