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Three kg of gas in a piston-cylinder assembly undergo a process during which the relationship between pressure and specific volume is pv0.5 = constant. The process begins with p1=250 kPa and V1=1.5m
A rubble masonry open chanel is being designed to carry 500 ft 3 /s (14 m 3 /s) of water on a 0.0001 slope. Using n= 0.017, find the most efficient dimensions for a rectangular channel.
A feeder heater extracts steam from a turbine at 600kPa and 250C which it combines with 0.3 kg/s of liquid at 600 kPa and 150C. The exhaust is saturated liquid at 600 kPa.
If the power plant has an overall thermal efficiency of 32%, determine (a) the amount of coal consumed during one day in kg and (b) the mass flow rate of air through the furnace in kg/s.
Water is boiled at 1 atm pressure in a 25-cm-internal- diameter stainless steel pan on an electric range. If it is observed that the water level in the pan drops by 10cm in 45 min, determine the ra
A fully loaded plane weighs 200,000 lbf as it lands at a speed of 125 mph. The mass of the brakes on the plane is 200 lbm and the brake assembly has an equivalent specific heat of 0.20 Btu/lbm &midd
Atmospheric air at 10 psia and 70 F dry bulb has a relative humidity of 50%. If the air is sensibly heated at a constant pressure to 80F dry bulb. What is the final relative humidity?
A 4-ft concrete post is reinforced with four steel bars, each with a 3/4 in. diameter. Knowing that E of steel= 29x10^6 psi and Eof concrete= 3.6x10^6 psi.
An alloy named "Cylon" is composed of 25 wt.% of metal A and 75 wt.% of metal B. If the densities of metals A and B are 6.17 and 8.00g/cm^3, respectively, whereas their respective atomic weights are
Consider two reversible refrigerators operating in series. Determine the temperature (°C) of the intermediate reservoir.
Carbon dioxide passing through a heat exchanger at a rate of 100kg/hr is cooled down from 8000C to 500C. Write the steady flow energy equation.
The air enters at 350 C and 0.1 MPa at a rate of 2 kg/s. Determine the heat transfer rate between the two fluids (kW) and the exit temperature (C) of the air.
5m3 of air at 2bar, 270C is compressed up to 6bar pressure following PV1.3 = constant. It is subsequently expanded adiabatically to 2 bar. Considering the two processes to be reversible, determine
One mole of an ideal gas at 1.0 Mpa and 300K is heated at constant pressure till the volume is doubled and then it is allowed to expand at constant temperature till the volume is doubled again. Cal
A reversible heat engine operating a 1500 F source and the atmosphere at 0 F produces work to drive a reversible heat pump. Determine the heat transfer rate (kBtu/hr) to the home.
A circular shaft subjected to a repeated axial tensile load of 25KN. The shaft is made from AISl 4140 OQT 1100 steel. Determine the design factor at the hole and at the fillet.
Stray heat transfer with the surroundings and changes in kinetic and potential energy are negligible. What is the power required by the pump?
Assuming the air behaves as an ideal gas with cv= 0.72 kJ/kg-K, find (a) the mass of the air, (b) the final temperature of the air, and (c) the entropy produced.
Calculate the exergies of two closed systems, respectively; 1 kg of steam at 800 kPa and 180 °C, and 1 kg of R-134a at 800 kPa and 180°C. Which has the capability to produce the most work i
The tanks are connected by a siphon (with diameter=25 mm) that reaches a height of 2.5 meters from the common ground (.5 m meters higher than the surface of Tank A and 1.5 meters higher than the sur
Consider the 2-dimensional flow field for which u=Axy, v=By^2, where A=1m^-1 x s^-1, B=-0.5m^-1 x s^-1, and the coordinates are measured in meters.
Consider an ideal combined cycle with compression ratio of 7:1 in which air enters the compressor at 295 K, enters the turbine at 1200 K, and exits the heat exchanger at 400 K.
The exit speed and pressure is 32 m/s and stmospheric, respectively. Calculate the horizontal component of the force transmitted by the coupling between the nozzle and hose.
The heat exchanger effectiveness is 75%. Use a heating value for kerosene of 45,840 kJ/kg. What is the engine specific fuel consumption?