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A process requires a mixture that is 21 percent oxygen, 78 percent nitrogen, and 1 percent argon by volume. All three gases are supplied from separate tanks to an adiabatic, constant-pressure mixing chamber at 200 kPa but at different temperatures. The oxygen enters at 10°C, the nitrogen at 60°C, and the argon at 200°C. Determine the total entropy change for the mixing process per unit mass of mixture.
The concrete post (Ec=3.6*10^6 psi and Ac= 5.5*10^-6/degrees F) is reinforced with six steel bars. each of 7/8-in diameter (Es=29*10^6 psi and As=6.5*10-6/ degrees F).
(a) Determine the desired diameter of the disk. (b) If the rubber strain is not to exceed 0.2 in/in, determine the maximum allowable compressive force. Recall that the spring constant, k=Fx,or in terms of an axially loaded member
Essex Company has a price of $55/share today, and you purchase 2 calls with a $68 strike price for $2.75/share. (Each call consists of 100 share options.) In 6 months, when your options are about to expire, you exercise your options. The stock is tra..
The level of water in a city water tower is 125ft. above the ground. The tank is kept with an air space which can be pressurized with compressed air. It is important to maintain a pressure at the bottom of the tower at 75 psig
using the stress transformation quations only,given a stress state where sigma x=6500 psi,sigma y= 17,300 psi and tau xy=2900 psi, determine the principal stresses,the principal angle and the maximum shear stress.
You are preparing a life-cycle assessment of different transportation options for getting from your house to work (10 miles each way). The options include carpooling with three or more people, one person in a car, bicycling, or taking the bus.
A steel pipe carries an industrial oil under pressure. The steel pipe inside diameter is 36 in, the pressure head on the fluid is 383.0 ft. A)- Find the internal fluid pressure in psi
Calculate the surface area required for a stabilization pond to serve a domestic population of 1000. Assume 80 gpcd at 210 mg/l of BOD. Use a design loading of 20 lb of BOD/acre/day.
To calculate a rocket’s position, velocity, and acceleration at different points in time. A rocket, initially at rest on the ground, accelerates straight upward with a constant acceleration of 58.8m/s^2
The void ratio of a given soil A is twice that of another soil B,while the effective size of particles of soil A is one-third thatof soil B. The height of capillary rise of water in soil A on acertain day is found to be 400 mm. Determine the correspo..
Knowing that the modulus of rigidity is 77 GPa for the steel and 27 GPa for the aluminum, determine the largest angle through which end A can be rotated if the following allowable stresses are not be exceeded
A pipe network in the form of a cube is made with twelve identical pipes. Each pipe forms an edge of the cube. If the entire inflow and outflow occurs at two adjacent corners, determine the percentage of the flow which passes through the pipe connect..
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