Engineering, 27.02.2020 05:22 goofy44
A steel (E=30x106 psi, =0.292) bar is 10" long and has a square cross-section 2" on a side. It is loaded in axial compression with uniformly distributed end loads of 120,000 pounds. (a) Determine the change in the bar's length, section side, and section diagonal. (b) If the bar is put into a square hole exactly 2" on a side in a body of infinite rigidity and then loaded with the same load, find the change in bar length and the contact pressure along the bar sides. Consider the interface between the bar and the rigid material to be frictionless. (c) Calculate the % change in density due to deformation for parts (a.) and (b.).
Answers: 3
Engineering, 04.07.2019 18:10, lillygrl100
For the closed feedwater heater below, feedwater enters state 3 at a pressure of 2000 psia and temperature of 420 °f at a rate of ix10 ibhr. the feedwat extracted steam enters state 1 at a pressure of 1000 psia and enthalpy of 1500 btu/lbm. the extracted er leaves at an enthalpy of 528.7 btu/lbm steam leaves as a saturated liquid. (16) a) determine the mass flow rate of the extraction steam used to heat the feedwater (10) b) determine the terminal temperature difference of the closed feedwater heater
Answers: 3
Engineering, 04.07.2019 18:10, soreese02
An ideal otto cycle with air as the working fluid has a compression ratio of 8. the minimum and maximum temperatures in the cycle are 300 k and 1340 k. use constant specific heats at room temperature to determine (a) the amount of heat transferred to the air during the heat- addition kj/kg, (b) the thermal efficiency, and (c) the thermal efficiency of a carnot cycle ope limits. process, in rating between the same temperature
Answers: 2
A steel (E=30x106 psi, =0.292) bar is 10" long and has a square cross-section 2" on a side. It is l...
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