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Hot water at an average temperature of 80 C is flowing through a 15-m section of a cast iron pipe (k = 55 W/m.K) whose inner and outer diameters are 4 cm and 4.6 cm, respectively. The outer surface of the pipe, is exposed to the cold air at 5 C in the basement, with a heat transfer co- efficient of 25 W/m2.K.
The heat transfer co-efficient at the inner surface of the pipe is 150 W/m2.K.
Taking the walls of basement to be at 5 C also, determine the average velocity of the water in the pipe if the temperature of the water drops by 3 C as it passes through the basement.
gas is sampled at atmospheric pressure from the exhaust manifold of an internal combustion engine and analyzed. the
a primary settling tank is to be designed for a municipal wastewater treatment facility. the average design flow is 2
You are required to determine the decay curves for radioactive decay of a set of heavy isotopes. The isotope, 234U decays into 230Th with a half-life of 246000 years. The isotope, 230Th decays into 226Rn with a half-life of 75380 years. The isotope, ..
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.
a vertical pipe conveying water tapers from 50 mm in diameter at the top to 25 mm in diameter at the bottom in a length
assume you are given a spherical joint where the ball has a radius of 20 mm and socket has a radius of 22 mm. if the
what is ductile-to-brittle transition temperature? describe a method to determine ductile-to-brittle transition
resolve a vector a which has a magnitude of 50 units and a direction of 210 degrees into two vetors b and c. c is to be
sheet steel emerging from the hot roll section of a steel mill has a temperature of 120 k a thickness of delta 3mm and
a 30-cm-diameter 5-m-long steam pipe passes through a room where the air temperature is 20 c. if the exposed surface of
A thin flat plate 6in square with a surface temperature maintained at 250°F is tested for drag in a wind tunnel with an airspeed of 100ft/s. The air is at standard sea level pressure and 60°F and flows over the top and the bottom of the plate. This f..
an air otto cycle has compression ratio of 8. at the beginning or the compression process pressure is 1 bar.
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