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1.Explain what is meant by ‘conditioning’ inpolymers. Compare the behaviour of the polyethylene sheet andfibre (Spectra) in terms of conditioning. Explain the observed behaviour of the polyethylene sheet whenreheated.
2.Sandwhich structures are obviously very efficient in bending applications. Would they be equally efficient in tensile or compressive loading? Explain your answer in terms of area available for carrying tensile-compressive loads.
Wheeling-Pittsburgh Steel is investigating whether it should it should replace some of the basic oxygen furnace equipment now or wait to do it later. The cost later (i.e. 3 years from now) is estimated to be $1,700,000.
effect of acidic water on strength of soil used to store the water. the reduction in strength at various acidic ph
To apply shock loading to an artillery shell, a 20-kg pendulum A is released from a known hight and strikes impactor B at a known velocity Vo. inpactor B then strikes the 1-kg artillery shell C.
A company borrowes $25000 at an interest rate of a nominal 16% per year compounded quarterly. The company desires to repay the loan in 36 equal quartely payments, with the first payment starting three months from now.
Ends A and D of the two solid steel shafts AB and CD are fixed, while ends B and C are connected to gears. Knowing that a 4-kN(m) torque T is applied to gear B, determine the maximum shearing stress (a) in shaft AB, (b) in shaft CD.
For carbon tetrachloride, the boiling point constant is 5.03°C · kg/mol, and the boiling point of pure carbon tetrachloride is 76.50°C.
The tank material is such that it can withsatand tension caused by a volume expansion of 2%. Determine the max temperature rise in Celcius degress allowed without jeopardizing safety.
The maximum population that can be served from the new development without exceeding the capacity of the trunk sewer. Diameter, slope, and invert elevations of sewer XB.
An air-filled rubber ball has a diameter of 6 in. If the air pressure within it is increased until the ball's diameter becomes 7 in., determine the average normal strain in rubber.
A horizontal angle was measured by repetition six times with a total station. If the initial display reading was 21o33'18" and the final reading was 129o20'04", determine the value of the angle to the nearest second.
A contractor wants to build a fill at his new construction site. He has two options for purchasing his borrow material. Site A has a soil with a unit weight of 2.5 kN/m3, a moisture content of 14% and a cost of $8 per cubic meter
one open globe valve, one medium-radius elbow, and one 90 degrees pipe bend (kb=0.13) with a radius of curvature of 45 in. The length of the bend is not included in the 110 ft.
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