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1. A piston/cylinder contains 0.25 kg of R-134a at 100 kPa. It will be compressed in an adiabatic reversible process to 400 kPa and should be at 70?C. What should the initial temperature be?
2. A piston/cylinder contains 0.5 kg of water at 200 kPa, 300?C, and it now cools to 150?C in an isobaric process. The heat goes into a heat engine that rejects heat to the ambient at 25?C (shown in Fig. P6.46), and the whole process is assumed to be reversible. Find the heat transfer out of the water and the work given out by the heat engine.
at one point on the highway, a 720 ft equal-tangent crest vertical curve exists. measurements show that at 3+40 stations from the PVC, the vertical curve offset is 3.5 ft. assess the adequacy of this existing curve in light of the reconstruction d..
For this problem you will write a function that calculates avalue between zero and one for each element in a 512x512 matrix(yes thats 512x512).
Determine the embedment depth and the anchor force per unit length of wall for the retaining wall shown in Figure P15.15 using the FMM. Assume the soil above the groundwater to be saturated. Use FS = 1.5 to calculate the depth.
Two level sections of an east highway (G=0) are to be connected. Currently, the two sections of highway are seperated by a 4000-ft (horizontal distance), 2% grade. The westernmost section of highway is the higher of the two and is at elevation 100 ft..
An oedometer test on a clay soil gave the following results: Cc = 0.4, Ce = 0.08, OCR = 5. The thickness of the clay layer in the field is 2.6 m. The existing vertical effective stress at the mid-depth of the clay layer is 150 kPa.
A concrete mix with a 3 inch slump, water cement ratio of 0.50 and sand with fineness modulus of 2.4 contains 1700 lb/yd^3 of coarse aggregate, compute the required weight of coarse aggregate per cubic yard
Calculate the percentage of moment taken by flange and web for W24X68 beam
a concrete test cylinder is loaded with p= 100k (445 kn) and resulting shortening of 0.036" (0.0914 mm). determine the unit strain developed in the concrete.
Water enters the pump of a steam power plant as saturated liquid at 20 kPa at a rate of 45 kg/s and exits at 6 MPa. Neglecting the changes in kinetic and potential energies and assuming the process to be reversible
The total dissolved inorganic carbon (TIC) of a sample of groundwater is 8.33 mM. The temperature of the aquifer is 15C, the pH is 7.5, and the ionic strength is 0.05 M. What is the H2CO3, HCO3-, CO3 2-, and the partial pressure of CO2? [Use activ..
On a shovel/truck operation the production of the shovel is 293 BCY/h and a job efficiency of 0.75. The trucks used have a capacity of 12 BCY and have a cycle time of 45 min.(excluding loading).
Imagine a community for which its first roundabout is being built, something that is a relatively recent occurence even in this area. As the Director of Public Works for the community, how might you educate the members of the community? Which membe..
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