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Ignoring the weights of the arms, determine the couple M required to cause the drum to rotate. Also determine the reaction forces at A, D, and C.
Gas entering the turbine has been heated to 1000 k. a. What is the temperature at each point in the cycle? b. What is the thermal efficiency for this Brayton cycle?
Two flows of H20, one of which is a saturated vapor at 0.6 MPa and the other of which is at 0.6 MPa, 600degC, mix adiabatically in a steady-flow process to produce a single outflow at 0.6 MPa, 400de
A large flat plate is subjected to constant amplitude uniaxial cyclic tensile and compressive stresses. Compute the critical crack length if the fatigue life must be at least 3x106 cycles.
A steel cable 1.25 inches in diameter and 50 ft long is to lift a 40,000 lb weight. What is the length of the cable during lifting? The modulus of elasticity of the steel is 30x106 psi.
Assume that junctions of thermocouples are spherical and contain 30% of costantan and 70% of iron (mass fractions). a. Calculate time constants of both thermocouples.
A quality of 50% at the same pressure as it entered. Based on steady flow through the condenser what is the heat flow rejected to the outside air in Btu/s to three significant digits?
When selecting a refrigerant for a certain application, what qualities would you look fr in the refrigerant? Include in your discussion the importance of saturation temperature
Determine the critical heat flux, the increase of emperatre of the wire as the operating point jump from the nucleate boiling regime at the critical heat flux .Take the emissivity of the wire to be
If the exeriemental constant that depentds on th fliud is n=1, determine the nuclate boiling heat transfer coefficient and the value of the experimenal constant Csf.
Consider a Maxwell-Wiechert Model with two elements (E1= 3x109 Pa, t1= 1 min, E2= 3x106 Pa, t2= 100 min). The system is subjected to a stress relaxation experiment.
A host computer with an IP address of 192.168.12.5 using a subnet mask of 255.255.255.0 pings a computer with an IP address of 192.168.12.83. What happens to the data packet?
What is the wattage of the light bulb assuming that all of the electrical power to the bulb is dissipated as heat inside the refrigerator?
Explain how the water might be heated from 300 K to 600 K with almost no change of entropy of the universe.
Steam enters an adiabatic turbine at 5 MPa and 450 C and leaves at a pressure of 1.4 MPa. Determine the work output of the turbine per unit mass of steam if the process is reversible.
Determine the power dissipation required to maintain this temperature for air velocities in the range 5 < V< 10 m/s.
Find the rate of heat transfer from the ball bearings and the rate of production of new disorder in this quenching process.
The fourth power of radiating temperature Tl^4. Show that, for a given power output and a given Th, the area of the radiator will be minimum when Tl/Th = 3/4.
The average stock price is 86.85. Compute the cost of capital for this project in percentage points if the tax rate is 35%.
Find: a) the pitch diameter of the pinion. b) the pitch diameter of the gear. c) the output torque of the gear. d) the minimum length of the key used to attach the gear?
Calculate: a) the output speed of the driven sheave. b) the length of belt required. c) select an appropriate standrad belt from the table based on the calculated length.
The water is now compressed in a reversible process until it's pressure reaches 1.2 MPa. Calculate the work done by the water.
Assume the speed of sound is 700 mph, and calculate the projected volumetric flow rate for each of the two Dreamliner engines in m^3/s
Define the first four stages of development of critical thinking. List and describe at least four modes (or domains) of influence that shape our minds.