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A steel pipe with a 5 cm OD is covered with a 6.4 mm asbestos insulation (k=0.166 W/m.K) followed by a 2.5 cm layer of fiber glass insulation (k= 0.048 W/m.K). The pipe wall temperature is 315oC and the outside insulation temperature is 38oC. Calculate the interface temperature between the asbestos and fiber glass.
Consider two closely coiled helical springs, one made of steel, the other of copper, each 0.01m in wire diameter, one fitting with in the other. Each has an identical number of coils, n=20, and ends constrained to deflect the same amount.
How many times more ignition energy is required to achieve ignition of a fuel-air mixture at sea level with T = 298 K than at altitude of 6000 m where pressure P = 47,166 Pa and T = 248 K?
A centrifugal water pump operates at 1750 rpm and delivers 150 gpm of flow at a head of 125 ft. What would be the flow rate and head for a geometrically similar pump having twice the speed and half the diameter?
for some applications it is necessary to harden the surface of a steel above that of its interior. one way this may be
a 1050 hot-rolled steel of diameter 300mm has an ultimate tensile strength of sut724mpa that is hot-rolled is exposed
steam flows steadily through an adiabatic turbine. the inlet conditions ar 10 mpa 450 degrees c 80 ms and inlet area of
a heavy ball with a weight of 130 n is hung from the ceiling of a lecture hall on a 4.0-rm m-long rope. the ball is
a 9 mm bullet with mass 0.28 oz 0.0175 lbm exits a pistol at 1250 fts find the kinetic energy in btu. if this bullet
three children are standing on a 5x5-m raft. if the weights of the three children at points a b and c are 375 n 260 n
1 a barrel is rolled up an incline 20 ft along its length and 6 ft in vertical height by means of a rope that is
a copper-nickel alloy of composition 60 wt ni-40 wt cu is slowly heated from a temperature of 1000degc 2370degf. what
A steel plane of finite dimension and thickness of 13 mm has the initial (uniform) temperature of 35 C. put the plane into the solution in all sudden and the wall temperature is increased to 146 C spontaneously. The thermo diffusivity of the plane, i..
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