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A piston-cylinder device contains 3 ft3 of air at 60 psia and 150°F. Heat is transferred to the air in the amount of 40 Btu as the air expands isothermally. Determine the amount of boundary work done during this process.
how long (how many monthly payments) will it take Alexis to pay off the loan and accrued interest completely (to a zero balance). Use linear interpolation as necessary to get as close an answer as possible.
A sample of moist soil has a volume of 40.5 cc mass weight of 59.2 gms. After drying it has a mass weight of 48.3 grams. The specific gravity of the solids are 2.68.
If the plant uses sodium hypochlorite instead, what volume of NaOCl will be needed? Assume that the dry density of NaOCl is 1.2 kg/L and that 1 mg/L of dissolved NaOCl is equivalent to 1 mg/L of dissolved Cl2.
Sub 12 means from stage one to two. Heat transfer (Qsub12) occurs to a fluid of mass m whose volume increases at a constant pressure of 21 bar. Assume that the fluid is air (Csubv=0.718 kJ/kg *K and R=0.287 kJ/kg*K) and that Tsub1=725K and Tsub2=1100..
the triangular plate ABC is supported by ball and socket joints at B and D and is held in the position shown by cables AE and CF. If the force exerted by cable AE at A is 1000N , determine the moment of the force about line joining points D and B.
For an intermediate beam in 3 bays by 3 bays (each bay is 20' by 20') floor plan, draw the envelope shear and moment diagrams taking into account effect of pattern loading.
The moduli of elasticity of plain concrete and steal are 25 GPa and 207GPa respectively, and the corss-sectionial area of steel is 2% of that of the reinforced concrete.
A light rail transit agency operates trains over a 25-km long single-track line. During the peak period, it operates five trains at 15-min headway. Train travels at an average speed of 50 km/hr.
Assuming the kinetic and potential energy effects to be negligible, determine A) the mass flow rate in kg/s B) the temperature at the exit of the turbine, in C C) the power developed by the turbine in kW
Helium gas is compressed isentropically from 1 bar and 25 C to a pressure of 10 bar. The temperature of Helium after the compression is A) 25 C B) 63 C C) 250 C D) 384 C E) 476 C
A 2000 ft vertical curve connects to a +3% grade to a -5% grade. If the vertical tangents intersect at station 52+60.55 and elevation 877.62 ft, calculate the elavations at the VPC, VPT, high point and station 54+00.
Two pounds of an ideal gas are contained within a piston-cylinder arrangement. The initial volume and pressure are 1 ft3 and 75 psia respectively. The final volume is 3 ft3.
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