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The fibers are produced by chemical vapor deposition of fibers onto fine tungsten wires of dW=10µm. The final wire diameter is dB=75µm. The boron coated wires are then added to an aluminum matrix with VW+B=0.35 fiber volume fraction. The Moduli of the materials are given EW=410GPa ,EB=379GPa ,EAl=69GPa .Give a numerical value for the elastic modulus of the composite, for loading along the length of the fibers.
wind turbines are becoming more and more common as a method of energy production wind turbines by their very nature are
Superimpose a uniform ?ow parallel to the x-axis of 10 m=s and a source at the origin of strength q ¼ 10p m2/s. (a) Write the velocity potential f and stream function c.
A commercial heat pump has energy in to the system at a rate of 60 kW from a thermal reservoir. If the power input from an electric motor is 15 kW, (a) determine the power (kW) delivered to the office area. (b) Determine the coefficient of perform..
a gas is contained in a vertical cylinder fitted with a piston. atmospheric pressure outside is 1 bar and the piston
Aluminum-lithium alloys have been developed by the aircraft industry to reduce the weight and improve the performance of its aircraft. A commercial aircraft skin material having a density of 2.47 g/cm3 is desired. Compute the concentration of Li (..
a rankine power cycle uses 10.0 lbms of water witha high pressure of 100 psia low pressure of 1 psi.water enters the
block c starts from rest and moves downward with a constant acceleration. knowing that after 5 s the velocity of block a relative to block d is 8 ft/s, determine a) the acceleration of the block c. b) the acceleration of portion e of the cable.
Discuss typical material properties such as yield strength, ultimate strength, percent elongation, etc. What type of loading(s) (tensile, compression, torsion, combined) are the part subjected to during normal use
The proposed design for anemometer to determine the velocity of an airstream in a wind tunnel is comprised of a thin metallic strip whose ends are supported by stiff rods serving as electrodes for a passage of current used to heat the strip.
a rigid tank contains 0.1-kg of air at 300 kpa and 300 kelvin. the air is now heated until the pressure doubles.
a rankine cycle operates between pressure limits of 500 and 2 psia. the temperature of the steam entering the turbine
a garden hose is open at one end and capped closed at the other. a swimmer in an above-ground pool fills the hose
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