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A pipe with OD 6.03cm, ID 4.93cm carries steam at 250deg C with h = 200 W/m^2.K The pipe is covered with 2.5cm of magnesia (85%) insulation followed by 2.5cm of polystyrene (k = .025 W/m.K The outer surface is exposed to air at T = 20 deg C with h = 10 W/m^.K What is the rate of heat loss per meter of pipe?
one leg of a mercury u-tube manometer is connected to a pipe containing water under a gage pressure of 15 lbfin2. the
refrigerant r-134a with a mass of 0.08 kg is expanded adiabatically from a superheated vapor at 10 bar 40 c to a
Air passes through a gas turbine system at a rate of 4.5kg/s. It enters with a velocity of 150m/s and a specific enthalpy of 3000kJ/kg. At exit, the velocity is 120m/s and the specific enthalpy is 2300kJ/kg. The air has a heat loss to the surrounding..
a mixing chamber receives 3kgmin ammonia as saturated liquid at -20 c from one line and ammonia at 40 c 300 kpa from
determine the thickness of steel plate required for a 2m diameter cylindrical boiler with hemispherical ends if the
nasa is designing a mission to explore titan the largest moon of saturn. titan has numerous hydrocarbon lakes
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
what do the velocity triangles for two axial compressors in series with 50 degree of reaction look like? they have
Suppose a 24V drill has a current drawn from it that measures 5 amps. The drill bit is 2 inches in diameter. What force is the drill bit placing on the surface if the speed is 25 rpm? Assume the drill has an efficiency of 90%
steel rods of 0.05m diameter are heat treated by being passed through a heat-treating furnace in which the atmosphere
trees at the bottom of a lake are approximated as a truncated cone with a base diameter of 6 ft a top diameter of 1 ft
a frictionless piston-cylinder contains argon which is initially at 25 deg. c with a volume of 2.2m3. the system is
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