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Certain microalloyed steels contain small additions of vanadium or niobium that permit the grain size to be reduced to about 2 ?m if the processing of the steel is carefully controlled. Likewise, advanced aluminum alloys containing special types of particles can be produced to yield a grain size of about 2 ?m. Suppose we reduce the grain size of steel and aluminum to 2 ?m by such processing would a substantial increase in the strengths of these material result? To what levels should the grain size be reduced to obtain significant strength increase in the two materials?
two moles of nitrogen are initially at 10 bar and 600 k state 1 in a horizontal pistoncylinder device. they are
what is the actual mechanical advantage of the system?
(a) Find the rate of heat transfer (kW) to the water. (b) Draw a schematic of the system. (c) Determine the air outlet temperature (°C)
What is the mass of the lead weight, if 100 J of heat is lost from the water after the weight falls a distance of 3 m.
consider a finite wing with an aspect ratio of 7 the airfoil section of the wing is a symmetric airfoil with an
a frictionless piston-cylinder is filled with 3 liters of water at 250 kpa. initially the temperature of the water is
Find the needed length of the heated section of the tube and find the temperature of the water when it exits the heated section of the tube.
consider 2 kg of butane at pressure of 7.6 mpa in a rigid tank of 0.008 m3 volume.a calculate the temperature k of
The car travels up the hill with a speed of v = (0.4s) m/s, where s is in meters, measured from A. Determine the magnitude of its acceleration when it is at point s = 50 m, where p = 500 m.
a block of mass 10kg moves along a surface inclined 30acircdeg relative to the horizontal. the center of gravity of the
an atmospherse of a planet assumed to be pure carbon dioxide. surface pressure is 80 bar and the surface temperature is
air at 10 degc db and 5 degc wb is mixed with air at 25 degc db and 18 degc wb in a steady-flow process at standard
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