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The CIMS Co. is considering a new milling machine. They have narrowed the choices down to three alternatives in addition to the Null alternative. The relevant data are shown in the table below. Alternative Economy Regular Deluxe First Cost $75,000 $125,000 $220,000 Annual Benefit $28,000 $43,000 $79,000 M & Costs $8,000 $13,000 $38,000 Salvage Value $3,000 $6,000 $16,000 All machines have a life of ten years. Using incremental rate of return analysis, which alternative should the company choose?
A rectangular tank 2.0m wide, 4m long, and 2m deep contains water to a depth of 1.0m It is accelerated horizontally at 3m/s^2 in the x direction. a. Calculate the depth of water at each end of the tank
A river with 400 ppm of salts (a conservative substance) and an upstream flow of 25 m^3/s receives an agricultural discharge of 5.0 m^3/s carrying 2000 mg/L of salts.
Refrigerant 134a enters the condenser of a residential heat pump at 800 kPa and 35 degrees celcius at a rate of 0.018 kg/s and leaves at 800 kPa as a saturated liquid.
(a) determine if the flow will choke and both the downstream and upstream water depths. (b) if there is also a 1 ft high step up in bottom elevation at the contraction, determine if the flow will choke and both the downstream and upstream water de..
the block is fitted between the fixed supports. if the glued joint can resist a maximum shear stress of T(allow)=2ksi, determine the temperature rise that will cause the joint to fail. Take E= 10(10^3)ksi, v=0.2
Deisgn a thrust block needed to resist the force generated by a 45 degree flanged regular elbow which carries a flow of 14 cfs. The diameter of the fitting narrows from 24 inches to 18 inches and the inlet pressure is 100 psi.
The elevation of water in well A is 300m above sea level and well B is 350m above sea level. The wells are 45m apart. A dye test reveals that the specific discharge between the two wells is about 2.75m/day. What type of aquifer material do you expect..
At a local engineering firm, a supervisor thinks about buying a new copy machine for $700 but only wants to keep it for 3 years. Using the DDB find the book value of the machine at the end of 2 years.
A power plant emits 95 g/s of SO2 from an effective stack height of 60 m. The wind speed is 3 m/s and the solar insolation is slight. A) Estimate the ground level SO2 (ug/m^3) at a point 4 km directly downwind of the power plant
Natural gas is stored in very large vessels consisting of a floating tank and a liquid seal. The pressure in the tank is constant because the weight of the floating tank is constant. In the morning, the temperature of the natural gas is 300 K.
Torque is transferred through two shafts by means of gears. If the diameters of gears B and C are in the ratio 1:2, what should the ratio of shaft diameters be so that both shafts have the same shear stress
a= -10 (1/sec^2 ) x where x is the displacement of the mass in meters. If the initial position is -1 m and the initial velocity is +1 m/sec, find: (i) the velocity when x = 0 for the first time and (ii) the maximum and minimum values of x.
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