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An Otto Cycle engine has an initial air pressure and temperature of 14.7 psia and 60° F, respectively. 750 BTU of heat is supplied per Lbm of air mass at the end of compression. The compression
The pressure difference between the large and small diameter pipes registers as a column of 5 cm water. Assuming discharge coefficient of CD = 0.95, calculate the mass flow rate in the pipe.
A steel bar and an aluminum bar are joined end to end and fixed between two walls. The cross sectional area of the steel bar is As, the area of the aluminum bar is Aa. Initially, the bars are stress
A Pitot-static tube is used to measure the airspeed of an airplane. The pitot tube is connected to a pressure sensing device calibrated to indicate the correct airspeed when the temperature is 17 de
At a point on the free surface of a machine part, the strains are Ex=+1200 mu, Ey=+300mu, Yxy=+700 mu. Use Mohr's circle to determine: What are the principal stresses? Assume that E= 200 GPA and v=0.
A gas turbine unit has compressor inlet conditions of 100 kPa and 310 K. The compressor discharge pressure is 700 kPa, and the temperature is 565 K. Fuel enters the combustion chamber and raises the
The system is then cooled to 200 degees Celcius. What is the amount of heat that needs to be removed by using specific heats?
An air-standard Brayton cycle has compressor inlet conditions of 310 K and 98 kPa and turbine inlet conditions of 882 kPa and 1200 K. The heat transferred to the air in the high-temperature heat exc
The system is then heated while the pressure is held constant until the volume doubles. Determine how much heeat was added to the system.
If the mass of the cart is 100 kg and the jet of water leaves the nozzle(of area 0.001m^2 with a speed of 35m/s), Determine the speed of the cart 5 sec. after the jet is directed against the cart.
A Brayton cycle uses argon as the working substance. At the beginning of compression, the temperature is 335 K and the pressure is 480 kPa. The compression process is adiabatic with discharge condit
A 0.018 cubic meter rigid tank is filled with saturated liquid water at 120*C. A valve is opened until half of the mass is withdrawn in liquid form. Heat is transferred from a source at 230*C which
During these energy interactions, the pressure is maintained constant and the refrigerant is heated to 70oC (State 2). (a) Calculate the current (A) supplied to the resistor.
A closed system undergoes a polytropic process according to PV1.25=C. The initial temperature and pressure are 600 K and 200 kPa, respectively. 3.5 kg of air are the working substance.
A well insulated, rigid tank with a volume of 0.4m^3 and pressure 150kPa is subject to an internal resistance heater of 110V and 0.5A. Inside the tank, it is 50% water vapor and 50% water liquid.
Saturated water vapor at 400 F is heated at constant pressure until its volume is doubled. Determine the final temperature using ideal gas equation of state, the compressibility charts, and the ste
The corresponding mass flow rates (not the original volumetric flow rates) determine the mass flow rate of the mixed air (i.e., the combination of the two flows) leaving the chamber in kg/s.
An airplane is traveling at a constant speed of 200 m/s. Air enters the jet engine at the rate of 40 kg/s, while the combustion products are discharged at an exit velocity of 600 m/s relative to the
Water in a piston-cylinder assembly undergoes two processes in series from an initial state where the pressure is 1.0 MPa and 400C. Sketch both processed on a T-v ad P-v diagram.
A loaded railroad car with mass m is rolling at a constant speed v0 when it couples with a massless bumber system. Determine the maximum deflection of the bumber assuming the two springs are a) in
The L12 of a bearing is the life of the bearing at which 15% failures may be expected. A new bearing design follows a Weibull distribution with m = 2, and a L12 of one year.
Half of the work produced by the engine is used to drive an internally reversible heat pump which is supplied with heat at 17 ° C and transfers heat to a house at 37 ° C. Find he net power o
What is the total volume of air drawn into the three cylinders each time the engine executes one revolution?What is the total mass of the air drawn into the three cylinders each time the engine execut
A commercially available sump pump is capable of deliver-ing 2800 gallons per hour of water through a vertical lift of 16 feet. Calculate the power delivered by the pump to the water.