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A circular shaft of 120-mm diameter is subjected to end loads P = 45 kN, M = 4 kN.m, and T = 11.2 kN.m. What is the factor of safety, assuming a failure to occur in accordance with the octahedral s
What is the velocity of flow into the pipe line? What is the velocity of flow into the filter? If the density of the pipe line gas is .0064 gms/cm^3 what is the density of the gas at the filter inpu
In addition to driving the air compressor, the turbine drives a generator. How much power does the compressor require from the turbine? How much power is left over for the generator?
Determine the net force acting on block A. Using Newton's 2nd law, formulate the equation of motion for block A and solve for its acceleration.
Consider a building whose annual air conditioning load is estimated to be 120,000 kWh in an area where the unit cost of electricity is $0.10/kWh. Two air conditioners are considered for the building
Refrigerant-134a enters the condenser of a residential heat pump at 800 kPa and 35 degrees C at a rate of 0.018 kg/s and leaves at 800 kPa as a saturated liquid.
The compressor of a refigerator compresses saturated R-134a vapor at -10 C to 800kPa. how much work does this require when the process is isentropic?
Determine the rate of entropy generation (i.e. irreversibility) assuming the ambient temperature is 70 °F. You may neglect the combustion products (exhaust) in your analysis. Your result shoul
The diameter at the point of fracture is 10.1 1 mm (0.398 in.), and the fractured gauge length is 55.75 mm (2.195 in.). Calculate the ductility in terms of percent reduction in area and percent elon
An 8 ft3 tank contains air at an initial temperature of 80F and intial pressure of 100psi. The tank develops a small hole, and air leaks from the tank at a constant rate of .03 lb/s for 90s until th
Find the specific flow exergy in and out of the steam turbine in Example 9.1 assuming an ambient at 293 K. Use the exergy balance equation to find the reversible specific work. Does this calculatio
Determine Radial and tangential stresses as functions of r. Calculate these stresses at a minimum of 7 radial positions and plot your results.
Assume this can be done in a reversible process by the use of heat engines and neglect kinetic energy changes. Find the water exit temperature and the power out of the heat engine(s).
The valve is opened and heat is transferred so that the water comes to a uniform state with a total volume of 1.006 m3. Find the total mass of water and the total initial volume. Find the work and t
A closed tank, V = 10 L, containing 5 kg of water initially at 25°C, is heated to 175°C by a heat pump that is receiving heat from the surroundings at 25°C. Assume that this process is
A piston cylinder has R-134a at -20oC, 100 kPa which is compressed to 500 kPa in a reversible adiabatic process. Find the final temperature and the specific work.
In a Rankine cycle with reheat, steam at 500C expands in a high pressure turbine until it reaches the saturated vapor state. Find a steam inlet pressure for the high pressure turbine.
A hot water stream at 80 C enters a mixing chamber with a mass flow rate of 0.5 kg/s where it is mixed with a stream of cold water at 20 C.
A cantilever beam has a z section of uniform thickness for which Iy = 2/3th^3, Iz = 8/3th^3, and Iyz = -th^3. Determine the maximum bending stress in the beam subjected to a load P at its free end.
A square threaded power screw has a lead angle (lambda) of 15o. What is the preferred method of joining composite materials - using adhesives or using screw fasteners? Why?
If this house were heated instead by a heat pump that has an average COP of 2.4, determine how much money the home owner would have saved that month. Assume a price of 8.5¢/kWh for electricity.
A relief valve is installed on the tank to keep the pressure constan during the process. Find the mass of steam that is bled from the tank, in kg? Find the amount of heat transferred in kJ?
Determine the maximum steady-state hay temperature for dry hay (q,dot = 1W/m^3), moist hay (q,dot= 10W/m^3), and wet hay (q,dot= 100W/m^3). Ambient conditions are T inf =0 C and h =
At t=0 bullet A is fired vertically with an initial velocity of 450 m/s. After 3 seconds, bullet B is fired upward with an initial velocity of 600 m/s. Determine the time t, after nA is fired, at wh
Assuming that flow is steady and incompressible obtain a) the y component of the velocity b) show that the acceletation at a point (2,1) is 20 i+ 26/3