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An electrical wire having a diameter of 1.5 mm and covered with a plastic insulation (thickness = 2.5 mm) is exposed to air at 300 K, and h0 = 20 W/m2 K. The insulation has a k of 0.4 W/m K. It is assumed that the wire surface temperature is constant at 400 K and is not affected by the insulation. Find the heat loss per unit length of the wire with the insulation present.
a dump truck is shown in the figure. the loaded container has a mass of 8000 kg and may be modelled as a solid
i need you to write a report about heat treatment of steel. i will attach the report format which you need to stick
Cortical bone gets weaker with aging, but it turns out that diaphyseal diameters can also change with aging, particularly in males, such that the safety factor of the diaphysis is approximately constant with aging.
a research facility on the moon will include a series of canals connected to a central lake which will simultaneously
a 75-lb stoplight is suspended between two poles as shown in fignbspp3-27. neglect the weight of the flexible cables
a sled is at the top of a snowhill that has a vertical height of 150 ft and slopes down with an angle of 20 degrees. if
carbon dioxide co2 contained in a piston-cylinder arrangement initially at 87 psia and 720 r undergoes an expansion to
hot oil cp2.3 kjkg.c at a rate of 2.5 kgs enters an adiabatic exchanger at 180 c and leaves at 150 c. cooling water
how do you solve for the stresses acting on a perimeter point centered on the y axis the force is applied parallel to
A cylindrical bar of aluminum 19 mm (0.75 in) in diameter is to be deformed elastically by application of a force along the bar axis. Using E=10 psi (Modulus of Elasticity), determine the force that will produce an elastic reduction of 1e-4 in. in..
in a quasi-equilibrium process in a closed system a gas expands from a volume of 0.15m3 and a pressure of 120kpa to a
when a 2000 lb vehicle is empty the static deflection of its suspen- sion system is measured as 0.8 in. what is the
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