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A two-dimensional flow field is described by V=-4yi-4xj. Find a functional expression of the streamlines and sketch several representative streamlines in the first quadrant (x>=0, y>=0).
What is the effect of the propane addition on the mole fractions of propane in the vapor and liquid phases? Explain your answer.
An Air Force jet has an engine under development that is being studied for performance capabilities while the aircraft is at an operating altitude of 2000m and at a velocity of 225 m/s.
Its composition is 90% Ti, 6% Al, and 4%V (mass percent's). What are the mass fractions of Ti, Al, and V? What are the mole fractions of Ti, Al, and V. Calculate the average molecular weight of the
For each case, determine the specified property value and locate the state by hand on sketches of the p-v and T-v diagrams.
A pressure cooker cooks a lot faster than an ordinary pan by maintaining a higher pressure and temperature inside. The lid of a pressure cooker is well sealed, and steam can escape only through and
At the beginning of the compression stroke, the volume of a certain diesel engine cylin-der is 1.000 liter and it is filled with air at 300 K and 100 kPa absolute. At the end of the compression stro
Calculate (a) the energy of a 1150-kg car consumes if it is driving at a velocity of 20m/s and a 100 m-long uphill road with a slope of 10°; (b) the power is will require if the car is accelerat
The basic barometer can be used to measure the height of a building.if the barometric pressure reading at the top and at bottom of the building are 675 and 695 mm Hg, respectively, determine the hei
Goldilocks illegally entered the house of three bears, where she found three bowls of por-ridge: a 2.0-quart bowl at 150°F (too hot), a 1.0-quart bowl at 90°F (too cold), and a 0.5-quart bow
A System changes its state from state 1 to state 2, following Pv=constant.. The pressure (P) and specific volume (v) at State 1 are 0.2 MPa and 0.5 m^3/Kg respectively.
Derive an expression for the compressibility of air, represented by Tau, for 1: and Isothermal Process and 2: for an isentropic process.
A 200-W vacuum cleaner is powered by an electric motor whose efficiency is 80%. (Note that the electric motor delivers 200 W of net mechanical power to the fan of the cleaners).
A steam power plant operates on the ideal reheat Rankine cycle. Steam enters the high-pressure turbine at 8 MPa and 500 oC and leaves at 3 MPa. Steam is then reheated at constant pressure to 500 oC
A solid cube of wood having dimensions of 0.5 m3 is floating in water with 0.3 m of its dimension above the surface. What is the specific weight of the wooden cube?
Determine the minimum bolt diameter required to support an applied load of P = 155 kN if a minimum factor of safety of 2.0 is required with respect to both bolt shear and plate bearing failure.
A power plant burns gas with HHV of 55,000 KJ/KG to generate electricity of 10 MW. If the overall efficiency is 40%, how much natural gas needs to be burned every day?
Determine 1) the energy flow rate of the oil at the inlet; 2) the difference of energy flow rate between the outlet and inlet; 3) the overall efficiency of the motor-pump system?
If cutting speed = 3.5 m/s, the tool must be changed every 3 workparts; but if cutting speed = 2.5 m/s, the tool can be used to produce 20 pieces between tool changes. Determine the cutting speed th
A fan is to accelerate quiescent (velocity is 0 m/s) air to a velocity of 10m/s at a rate of 3 m3/s. If the density of air is 1.15 kg/m3, determine the minimum electric power that must be supplied t
Assuming the average fuel composition and energy content are CH2 and 15000 Btu/lb, respectively, calculate the U.S. contribution to global carbon emissions in 2008. Give your answer in Gt of carbon.
Consider a cylindrical nickel wire 1.9 mm in diameter and 3.2 × 104 mm long. Calculate its elongation when a load of 260 N is applied. Assume that the deformation is totally elastic and that t
If these viscosities are the safe limits for the oil, specify the maximum start-up speed and the maximum running speed you would recommend for the pump.
A cylindrical specimen of some metal alloy having an elastic modulus of 108 GPa and an original cross-sectional diameter of 3.9 mm will experience only elastic deformation when a tensile load of 169
Oil "A" has a viscosity of 80Cst at 40C and 8Cst at 100C. Oil "B" has a viscosity of 90Cst at 40C and 15Cst at 100C. Which oil has the higher viscosity index?