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Airflow at Ma1 = 3.2 passes through a 25° oblique-shock deflection. What isentropic expansion turn is required to bring the flow back to
Airflow at Ma = 2.2 takes a compression turn of 12° and then another turn of angle ? in Fig What is the maximum value for the second shock to be attached?
Find the equivalence ratio and the percent theoretical air of the reactants.
What is the smallest motor you would need for a heat pump absorbing heat from the container and rejecting heat to the room at 20°C?
If the cost of natural gas is $1.10/therm (1 therm 105,500 kJ), determine how much energy and money the regenerator will save this company per year.
If the rate of heat transfer from the hot gases to water is 74 kJ/s, determine the rate of evaporation of water.
Suppose this setup is very long so the glass and air comes to nearly the same temperature (a co-flowing heat exchanger) what is the exit temperature?
How does energy conversion affect the environment? What are the primary chemicals that pollute the air?
How does the COP of a cascade refrigeration system compare to the COP of a simple vapor-compression cycle operating
How is the combined pump–motor efficiency of a pump and motor system defined?
Assuming complete combustion, determine (a) The air–fuel ratio and (b) The volume flow rate of air required to burn the hydrogen at a rate of 25 lbm/h.
Find the high and low temperature heat transfer and the net cycle work per unit mass of hydrogen.
Hydrogen is burned with 150 percent theoretical air during a steady-flow process at a pressure of 1 atm.
Determine (a) The final pressure, (b) The total work done by the hydrogen, and (c) The fraction of this work done against the spring.
Determine the power output of the turbine, and the heat transfer rate in the gas generator.
Maxwell relations. Use Maxwell relations to derive the Laplace equation for a sphere at constant temperature
A parcel of mass M is hanging down from a string attached to a hot air balloon. Find the tension of the string in the following situations.
Determine the reactions for each structure. All dimensions are measured from the centerlines of members.
Determine all reactions. The pin joint at B can be treated as a hinge. Determine all reactions. The pin joint at D acts as a hinge.
Determine the reactions at all supports and the force transmitted through the hinge at C.
Determine all reactions. The uniform load on all girders extends to the centerlines of the columns.
Determine the force in each member of the truss and state if the members are in tension or compression.
Calculate the pivot reaction force (FC) and hydraulic cylinder force (FAB) at a ramp angle of 10 degrees.
Explain your choice using Laplace equation and taking into account the gravity effect and the difference in the advancing and receding contact angles.