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Refrigerant 134a is being held in a rigid, spherical tank (r=0.5m). Initially, the R-134a has a temperature of 263K and a specific internal energy of 110.6kJ/kg. A thermal reservoir (T=308K) is brought in contact with the tank, transferring enough heat to the tank to raise the pressure inside to 4 bar. Calculate the entropy changes of the refrigerant and the thermal reservoir, and total change in entropy for this process.
A rectangular concrete beam of width b = 24 inches is limited by architectual considerations to a maximum total depth of h = 16 inches. it must carry a total factored load moment of Mu = 400 ft-kips.
for a laminar flow of a newtonian fluid in a tube of a circular cross section, show that the ratio of mean shear to the wall shear rate is 2/3
The volume of the system is doubled from 1 m^3 to 2 m^3 while 200 kJ of heat is added to the system. If no work is done except for the boundary displacement work and the pressure remains constant at 101.3 kPa (1 atm) throughout the process,
The factory will use a 4 ft deep on-site lagoon to stabilize the waste with a loading rate of 20 lb BOD/acre-day. Part a) What is the total BOD loading per day?
A stone A is dropped from rest down a well, and in 1 second another stone B is dropped from rest. Determine the distance between the stones another second later.
Plan 2 has a $40/month access fee, unlimited nights and weekends, 750 anytime minutes plus $0.29/minute for minutes over 750, text messages cost $0.05 each, and roaming cost $0.39/minute whenever she leaves the state.
What is the relation between reflection and transmission coeffients of a sea wall
given f(x) = -2x^6 - 1.5x^4 + 10x +2. use a root location technique to determine the maximum of this function. perform iterations until the approximate relative error falls below 5%.
A rectangular gate 6 ft tall and 5 ft wide in the side of an open tank is held in place by the force F as indicated in the figure. The weight of the gate is negligible, and the hinge at O is frictionless.
A pile resists the tension developed by three stay cables for a major for a tent (membrane) structure. Assuming no bending is desired in the pile (no resultant horizontal componenet),
Two reservoirs are connected with a 30" diameter pipe with a length of 19,680 ft. The water surface elevation in the upper reservoir of the upper reservoir is 984 ft, lower reservoir 886 ft and the elevation at the midpoint is 918 ft.
The center to center spacing to the two tanks is 14 m. The new tank imparts 150 kPa at the ground surface. Find the increase in vertical stresses due to the weight of the two tanks mid- way between the two tanks at the center of the clay layer.
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