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1 .The mechanical properties of cobalt may be improved by incorporating fine particles of tungsten carbide (WC). Given that the mod- uli of elasticity of these materials are, respectively, 200 GPa (30 x 106 psi) and 700 GPa
2. (a) What is the distinction between cement and concrete?
(b) Cite three important limitations that restrict the use of concrete as a structural material.
(c) Briefly explain three techniques that (102 x 106psi), plot modulus of elasticity are utilized to strengthen concrete by rein versus the volume percent of WC in Co from 0 to 100 vol%, using both upper- and lower- bound expressions.
The structural components of modern aircraft are commonly fabricated of high-performance composite materials. These materials are fabricated by impregnating mats of extremely strong fibers that are held within a form with an epoxy or thermoplastic..
a block having a mass of 0.8 kg is suspended from a spring having a stiffness of 120 nm. if the dashpot provides a
Consider a 100 mol mixture that is 80.0% methane (CH4) and 20.0% ethane (C2H6). To this mixture is added 22.0% excess air. Of the methane present, 91.90% reacts, 90.90% of which forms carbon dioxide (CO2), and the balance forms carbon monoxide (CO). ..
The steel pipe is filled with concrete and subjected to a compressive force of about 250 kN, figure 4. Determine the average compressive stress in the concrete and in the steel
consider the sysstem shown in figure 3-45 where m 2 kg b 4 nxm and k 20 nm. assume that x0 0.1 m and xdot0 0. the
Pure chlorobenzene is contained in a flask attached to an open-end mercury manometer. When the flask contents are at 58.3°C, the height of the mercury in the arm of the manometer connected to the flask is 747 mm, and that in the arm open to the atmos..
a steam power plant implements an ideal reheat rankine cycle. steam enters the inlet of the high-pressure turbine at 8
consider an ideal gas contained in a cylinder that can do work by pushing against a piston which has a surface area of
Explain why tempering cycle is essentially required in the heat treatment of high tensile carbon steel and what are the consequences if tempering cycle is not carried out?
on may 23 1998 a tanker truck loaded with gasoline p719.7 kgm3 jumped a jersey barrier and collided with an oncoming
Assume that a diaphyseal cross section carries a bending moment M. Let the cross section be circular with inner and outer diameter of 20 and 30 mm, respectively, and assume that the neutral axis (NA) passes through the centroid. Draw the cross sectio..
the horizontal roof of a building is coated with black tar. the roof is well-insulateed underneath while the upper
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