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Associated supplies are expected to cost $100.00 per year. The firm's discount rate is 10%. Compute the present worth of this investment for 5 years and for 10 years.
A gaseous mixture consists of 75 % methane and 25 % ethane by mass. One million cubic feet of this mixture is trapped in a geological formation as natural gas at 300 degrees Fahrenheit and 2000 psia
A Cylindrical tank is to contain gas at a pressure of 400 psi, and for safety reasons, the hoop stress in the tank wall must not exceed 12,800 psi. If the tank is 6 feet long, and has an inside diam
What force would be required to start a 250lb crate sliding across a cement floor which has a coefficient of static friction of 0.3 and a coefficient of kinetic friction of 0.2?
A well-insulated control volume operates at a steady state and has one inlet (location 1) and two outlets (locations 2 and 3). A rotating shaft delivers power from the system. The mass entering the
Simutaneously, the coolant carries the heat away from the flow such that the temperature inside the tube decreases in the axial direction at 4 C/m. What is the Eulerian derivative DT/Dt at x1?
For the wide-flange beam with loading shown, determine the largest load P that can be applied, knowing that the maximum normal stress is 160 MPa and the largest shearing stress using the approximat
In a Rankine cycle with reheat, steam at 500C expands in a high pressure turbine until it reaches the saturated vapor state. Find steam inlet pressure for the high pressure turbine.
A cylinder, subjected to internal pressure Pi only, is made of cast iron having ultimate tensile strengths in tension and compression of σu = 350 MPa and σ'u = 630 MPa, respectively. The
You are considering replacing the diesel engine for problem 4 with a microturbine with a pressure ratio of 8. The microturbine runs with natural gas having a heating value of 100,000 btu/therm and a
The energy loss in the system is 2.5 times the velocity head in the 2-inch pipe. Calculate the horsepower delivered by the pump to the oil.
Air at a rate of 10 lbm/s enters an adiabatic compressor at 15 Psia, 80 F and leaves at 150 Psia, 740 F. Calculate the horsepower required to run the compressor using air-tables as well as specific
A commercially available sump pump is capable of deliver-ing 2800 gallons per hour of water through a vertical lift of 16 feet. Calculate the power delivered by the pump to the water.
If the temperature of section 1 is 143 Celcius and section 2 is 490 Celcius, what is the temperature (Celcius) of the mixture if the seperation between the two compartments is removed?
A 150 hp diesel engine for running an emergency generator in a building ha sa compression ratio of 19 with a cutoff ratio of 1.8. It rejects its heat by way of cooling water that goes to a radiator.
A tank of 0.5 m^3 volume contains compressed air. A valve is opened and air escapes with a velocity of 300 m/s through an opening of 130 mm^2 area. Air temperature passing through the opening is -15
A helium gas in a piston/cylinder is compressed from 100kPa, 300 K to 200kPa in a polytropic process with n=1.5. Find the specific work and specific heat transfer.
A Boat is traveling along a circular path having a radius of 20m . Determine the magnitude of the boat's acceleration if at a given instant the boats speed is v = 5 m/s and the rate of increases in
Where a is a scaling constant and v is the relative speed of the body moving through the air. How much faster would the cyclist go if he could increase his power output by 10%?
Consider a newly designed structure. The capacity of the structure is estimated to be c-bar = 12,500 kips, and the standard deviation ?c = 5,000 kips. It is assumed that the capacity is normally dis
An electric generator provides 500 kW and is powered by a diesel engine with a compression ratio of 19 and a cutoff ratio of 2. The efficiency of the electric generator is 95%. Estimate the consumpt
The United States is currently considering standards to generate 20% of its electricity from renewable resource in the next 15 years. If this power is generated by wind turbines that generate 3 MW e
If half of these are coal-fired, how many tons of coal will be required per year for the new plants, and how many tons/yr of ash and SO2 will have to be handled in 2024?
Find the amount of work in KJ/Kg that can be saved if the compressor is divided into two identical stages with ideal intercooling.
List three engineering components / applications that, in your judgment, need high stiffness and low weight. What material choices would you consider for these applications?