Engineering, 05.05.2021 23:10 svarner2001
A closed system undergoes a cycle in which heat is added at a temperature of 750 K
isothermally with an initial and final specific entropy values of 2.5 kJ/kg K and 6.0
kJ/kg K respectively. If the rest of the cycle consists of an adiabatic expansion down to
a temperature of 415 K, an isothermal heat rejection to the initial entropy value and
finally, an adiabatic compression to the initial temperature, find the net heat transferred
during the cycle.
(b) 4 kg of fluid at a pressure of 250 kPa is compressed from a volume of 3.6 m3
to 1.2 m3
within a cylinder and piston assembly. Calculate the work done on the fluid.
Answers: 2
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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.
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A closed system undergoes a cycle in which heat is added at a temperature of 750 K
isothermally wi...
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