Engineering, 05.05.2020 04:44 atefah88
Choose the options below that are true for the entropy of a substance. Select all that apply: Heavier atoms possess greater entropy at a given temperature than lighter atoms. The weight of an atom has no effect on entropy. Molecules with greater numbers of atoms are associated with lower entropy. The entropy of a substance is influenced by the structure of the particles that comprise the substance.
Answers: 1
Engineering, 04.07.2019 12:10
On a average work day more than work place firs are reorted
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Engineering, 04.07.2019 18:10
Awall of 0.5m thickness is to be constructed from a material which has average thermal conductivity of 1.4 w/mk. the wall is to be insulated with a material having an average thermal conductivity of 0.35 w/mk so that heat loss per square meter shall not exceed 1450 w. assume inner wall surface temperature of 1200°c and outer surface temperature of the insulation to be 15°c. calculate the thickness of insulation required.
Answers: 3
Engineering, 04.07.2019 18:10
Aturning operation is performed with following conditions: rake angle of 12°, a feed of 0.35 mm/rev, and a depth of cut of 1.1 mm. the work piece is aluminum alloy 6061 with t6 heat treatment (a16061-t6). the resultant chip thickness was measured to be 1.0 mm. estimate the cutting force, fc. use shear stress of 207 mpa and coefficient of friction on the tool face of 0.6.
Answers: 1
Engineering, 04.07.2019 18:20
Air is compressed isentropically from an initial state of 300 k and 101 kpa to a final temperature of 1000 k. determine the final pressure using the following approaches: (a) approximate analysis (using properties at the average temperature) (b) exact analysis
Answers: 1
Choose the options below that are true for the entropy of a substance. Select all that apply: Heavie...
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