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A piston cylinder is filled with .85 kg of refrigerant-134a at -10 degrees Celsius. The piston moves freely, and has a mass of of 12 kg and a diameter of 25 cm. Heat is added to the closed system (the refrigerant) until the temperature rises to 15 degrees Celsius.
A) How far did the piston move (use interpolation)?
B) What is the change in enthalpy of refrigerant 134a?
Roe is the ratio of nonprestressed reinforcement in a section, and roe balanced is the ratio of tensile reinforcing producing balanced strain condition. Show cross sections, including bar sizes, arrangements, and spacing.
A permeameter with a cross-sectional area of 400 cm2 contains 3 soils in 50 cm thick layers. A total head difference of 2.0 metres results in a flow rate of 100 cm3/s. The head loss through the top layer of soil is 50 cm.
The mean annual precipitation for a certain 132 square mile watershed is 25 inches. Assume the 20 percent of the annual precipitation reaches the watershed outlet as stream flow. Determine the mean stream flow rate in ac-ft/yr, sfd/yr, and square met..
Total stress analysis is usually preferred for construction of embankments and for excavations, we use effective stress analysis, but why? Total stress is Undrained strength of the soil
The CIMS Co. is considering a new milling machine. They have narrowed the choices down to three alternatives in addition to the Null alternative. The relevant data are shown in the table below
A street car line on the center of an 80 ft street makes a 75degrees 24' turn into another street of equal width. Thecorner curb line has R=12 ft. What's the largest R that canbe given a circular curve for the tract center line if the law requires it..
A 2 kg block is projected up a frictionless plane with and initial speed of 8 m/s. The plane is inclined upward at 30°. If the block travels 5 m before striking a linear spring, what should the spring stiffness be if the spring compression is to be l..
A 6ft wide, 10ft high vertical rectangular gate has its top edge 6ft below the water level. it is hinged along its lower edge. what force, acting on the top edge, is necessary to hold the gate shut?
a well is contaminant with 340 mg/L of tetrachloride ( perchloroethylene). the water must be remediated to achieve a concentration of 0.2 mg/L ( the detention limit ).
n 2006, the united states emitted 6,000 million metric tons (Mt) of CO2, 26.6 MtCH4, and 1.2 MtN2O. using 100 year global warming potentials, whats is the equivalent CO2 emission rate of the total for these three gases, in GtC-eq/yr
Should Bernard bid for the project assignment? Why or why not? Does Bernard have an unfair advantage over firms having designed the project on which he wants to bid?
The herbicide 2,4,D, is applied to a golf course at a rate of 1.2 kg/ha. The organic matter content of the soil is 1%, bulk density is 1.3 g/cm3, and water content is 0.3. a) What fraction of the herbicide is adsorbed, and what fraction is dissolve..
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