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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.
Air enters a nozzle at 240 kpa and 400 k with a velocity of 10m/s. it exits at 100kpa. the nozzle adiabatic efficiency is 90%. Delta PE=0, s.s.s.f, uniform velocity at exit and entrance.
the 2007 bmw z4 coupe 3.0si can accelerate from 0 to 59 mph in 5 s and its maximum speed is 152 mph. assuming the car
air within a piston-cylinder assembly initially at 175psi 660of undergoes an isentropic expansion to 20 psi. what is
Helium gas enters a nozzle, whose isentropic efficiency is 95 percent with a low velocity, and it exits at 14.4 psia, 160 degrees F, and 940 ft/s. determine the temperature and pressure at the nozzle inlet.
the velocity of the package sliding down the ramp at point a is 2.4 fts at the instant shown. knowing that the
an hydraulic turbine operates under an available head of 85 m at a flow rate of 0.25 m3s. the electrical power output
an ideal otto cycle heat engine with compression ratio 15.1 assume perfects gases with constant specifics heat. heat
a shaft with a diameter of 100 mm rotates at 1500 rpm. a fluid-film bearing is designed to support a 5 kn load. assume
a uniform solid sphere of radius r 0.480 m and mass m 17.0 kg turns counterclockwise about a vertical axis through
consider the function fxx3-2x4 on the interval -22 with h0.25. use the forward backward and centered finite difference
A wind turbine with a diameter of 100 ft operates during a 24-h period in which the wind velocity may be approximated by half a sine wave as V(theta)=V(m)sin(pi*theta/24), where theta is time in hours and V(m)= 10^5 ft/h. The wind density is 0.076 l..
Consider the 2.0micrometer long GaAs device where the E-field is 5kV/cm and Mn*=.067M0. Calculate the transit time of an electron through the device if the mobility is 8000 cm^2V-s.
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