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Sketch the stress-strain behavior for the following pairs of polymers. Use the same axes for each pair: a) polystyrene at 0 and 60 degrees celsius b) high density polyethylene and low density polyethylene.
The 60W fan of a central heating system is to circulate air through the ducts. The analysis of the flow shows that the fan needs to raise the pressure of the air by 50Pa to maintain flow. The fan is located in a horizontal flow section whose diameter..
a frictionless piston-cylinder contains argon which is initially at 25 deg. c with a volume of 2.2m3. the system is
in each cycle of its operation a refrigerator removes 17j of heat from the inside of the refrigerator and releases 40j
If the bar is subjected to centric forces of magnitude P = 30 kN and knowing that EA = 70 GPa and EB = 105 GPa, determine the normal stress (a) in the aluminum layers, (b) in the brass layer.
consider a vertical piston-cylinder assembly with a 50 kg piston attached to a spring and exposed to atmospheric
what do you understand by closed packed planes and closed packed direction in the arrangement of atoms? justify their
Gasoline flows from a 0.25 m diameter pipe in which the pressure is 250 kPa, that contracts into a 0.125 m diameter pipe in which the pressure is 100 kPa. If the pipes are horizontal bad viscous effects are negligible, determine the flow rate (Q). (G..
the diffusion constant do and activation energy q of c in bcc fe is 0.01 cm2sec and 80kjmol respectively. in fcc fe the
one cubic foot 1 ft3 of air is contained in a piston - cylinder arrangement. the axis of the cylinder is oriented in
a steel rod 20mm diameter is passesthrough a brass tube 25mm internal diameter and 30mm external diameter. the tube is
an object moves with constant acceleration 4.20 ms2 and over a time interval reaches a final velocity of 12.6 ms. a if
consider heat transfer to a turbulent boundary layer with no pressure gradient or transpiration but with a vanishingly
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