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Using both graphical and analytical methods in assessing the stability of the rock mass and calculate factors of safety for both the intact rock.
Water at 70 kPa and 100 C is compressed isentropically in a closed system to 5 MPa.Determine the final temperature of the water and work required ,in KJ/kg for this compression.
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.
5 kgm of water is at 15 C and is contained in a vertical cylinder by a frictionless piston of a mass such that the pressure of the water is 700 kPa.
In order to have the machine deliver 100,000 Nm/kg of air without any heat input, what is the exit air speed? What is the exit speed when the machine is idling?
10.0 kgm of air is contained in a cylinder by a free-floating, frictionless piston. Initially the air is at 27 C and occupies a volume of 2.87 m^3 and the piston is resting on a set of stops.
Estimate the extent of reaction (monomer conversion) necessary to produce a number average molecular weight of 70,000. What will be the polydispersity index of this polymer?
Two identical and CFR computers are placed in a redundant configuration. If the system reliability is to be 0.95 at 3000 operating hours, determine the corresponding MTTF for each computer.
The 50-lb package starts from rest, slides down the smooth ramp, and is stopped by the spring. The coefficient of static friction between the package and the ramp is μs=0.12.
A 0.12-ounce bullet hits at 2000 ft/s a suspended 10-lb block of wood and becomed embedded in it. The angle α through which the wires supporting the block rotate as a result of the impact is
The mass of the ball is m=2kg and the strings length is L=1m. The ball is released from rest in position 1 and swings to position 2, where ?=40°. Use conservation of energy to determine the mag
Consider a gas-turbine power plant whose pressure ratio is 8. The Isentropic efficiencies of the compressor and the turbine are 80%, and there is a regenerator with effectiveness 0f 70%.
The uniform slender has a mass of 15 kg. Determine the horizontal and vertical components of reaction on pin O, and the pin acceleration of the rod just after the cord is cut.
The plate is subjected to an axial force of 75 kN, The objective is to determine the maximum stress developed in the plate. Use Young's Modulus E=205 GPa.
Calculate the mass an linear absorption coefficients of air for Cr K alpha radiation. Assume that air contains 80 % nitrogen and 20 % oxygen by weight and has a density of 1.29*10^-3 g.cm^3.
Helium is used to operate an 18 hp gas turbine. The gas enters the steady-flow device at 220 ft/s through an area of 0.020 ft2. The inlet state is 40 psia and 440OF. Compute the heat transfer rate i
Steam enters a nozzle at 30 bars and 320C and leaves at 15 bars with a velocity of 535 m/s. The mass flow rate is 8000 kg/h. Neglecting the inlet velocity and considering adiabatic flow, compute: th
a. Where along the plate is T = Tmax? b. Is the flow laminar or turbulent? Justify your answer. c. What is the total heat which can be dissipated if the plate temperature is not to exceed 80 °C
Determine the magnitude and coordinate direction angles of the resultant couple moment. Determine the magnitude of the resultant couple moment.
Calculate the convective heat transfer coefficient. Determine the heat transfer in W for an isothermal plate maintained at 57 °C.
Air at 7 kPa and 35 °C flows over a flat plate at 7.5 m/s. The plate is 30 cm square and is maintained at 65 °C. Determine if the air flow is laminar or turbulent. Justify your answer.
Determine the mole fractions of polyvinyl chloride and polyvinyl acetate in a copolymer having a molecular weight of 11,000 g/mol and a degree of polymerization of 150.
Find the force required for the direct extrusion of commercially pure aluminum (1100-O) billet 8 in in diameter into a rod 2 inches in diameter.
A mass of 3 kilograms of steam at 2 MPa and 250°C are contained in a rigid tank. How much heat must be removed from this vessel to cool it to a saturated vapor.