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1. Write an essay on polymeric materials that are used in the packaging of food products and drinks. Include a list of the general requisite characteristics of materials that are used for these applications. Now cite a specific material that is utilized for each of three different container types and the rationale for each choice.
2. Write an essay on the replacement of metal- lic automobile components by polymers and composite materials. Address the fol- lowing issues: (1) Which automotive com- ponents (e.g., crankshaft) now use polymers and/or composites? (2) Specifically what materials (e.g., high-density polyethylene) are now being used? (3) What are the rea- sons for these replacements?
a can of soft drink at room temperature is put into the refrigerator so that it will cool. would you model the can of
suppose a heat engine is connected to two energy reservoirs one apool of molten aluminum 660degc and the other a block
a cord is wound in the slot of cylinder a. mass b moves downward with a velocity of 6 m. assume no slipping of the
two horizontal parallel plates are spaced 2.76 mm apart. if the pressure decreases at a rate of 1.54 kpam in the
find the solution to the second order ode with constant coefficients. first solve for the homogeneous solution and then
on may 23 1998 a tanker truck loaded with gasoline p719.7 kgm3 jumped a jersey barrier and collided with an oncoming
a 1050 hot-rolled steel of diameter 300mm has an ultimate tensile strength of sut724mpa that is hot-rolled is exposed
the upside-down steel a frame shown in the figure is to be bolted to steel beams on the ceiling of a machine room using
Sketch Bode plots for the following systems. Use asymptotes, but locate at least one point in the Magnitude plot and make sure to calculate zeta for complex peaks.
air enters the compressor of an air-standard brayton cycle with a volumetric flow rate of 60 m3s at 0.8 bar 280 k. the
consider fully developed condition in a circular tube with constant surface temperature ts lt tm. determine whether a
air at 68 degrees f and 1atm. flows over a flat plate at 114.8 fts. the plate is 29.5 in long and 12 in wide. the plate
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