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Consider two closed systems A and B. System A contains 3000 kJ of thermal energy at 20°C, whereas system B contains 200 kJ of thermal energy at 50°C. Now the systems are brought into contact with each other. Determine the direction of any heat transfer between the two systems.
Derive the expressions for the concentration exiting a CSTR and a PFR for a zero order removal reaction. Which reactor design is more efficient in terms of volume and hydraulic retention times?
Due to a street crossing a roadway, the elevation of the roadway at station 3 +413.760 must be at 129.388 m. Design the curve?
a pump is used to send water from one reservoir to another elevated reservoir. The pipe diameter is 0.120 m. The head-loss through the valve and pipe is given by equation hL =Bv12 2g
The flow in the river is 30ft^3/min and the first-order rate constant for disinfection is 6min^-1. 1)What kind of hydrodynamic model should you use. 2) write the mass balance equation for microorganisms in symbols at steady state. define symbols.
A company uses a 50% solution of NaOH to maintain the pH of water circulated in one of its furnace exhaust scrubbers. The cost of the solution is $200 per ton f.o.b. (free-on-board).
A four story office building ha interior columns that are spaced 30ft apart in two perpendicular directions. If the flat-roof loadingis estimated to be 30 lb/ft2 , determine the reducedlive load supported by a typical interior column at ground level.
The diaphragm is ruptured and fluid fills the entire volume of the vessel. Assume that the fluid is an ideal gas. After you have determined Qsub12, Wsub12, and delta U for the process, calculate the final temperature of the gas.
No incisions are noted. Find the maximum axial tension using LRFD. Can we resist the same force in compression if the member is 10ft long?
Your company is considering the purchase of new earth moving equipment. The total purchase is $240,000 and we pay with $100,000 cash and borrow the rest. (12% per year nominal, compounded monthly for 5 years).
An incident occurs on a freeway that has a capacity in the northbound direction, before the incident, of 4000 veh/h and a constant flow of 2900 veh/h during the morning commute.
A piston-cylinder device contains helium gas initially at 150 kPa, 20 degrees C, and 0.5 m^3. The helium is now compressed in a polytropic process (PV^n = constant) to 400 kPa and 140 degrees C.
Two ships A and B are moving with constant speeds Va and Vb along straight intersecting courses. The navigator of ship B notes the time rates fo change of the separation distance r between the ships and the bearing angle theta.
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