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In a processing plant, cold water at 3°C is pumped through a 20 mm (outside diameter) galvanized steel pipe. The pipe passes through a room where the air temperature can be as high as 30°C and the relative humidity as high as 90%. To prevent condensation on the pipe surface, it is insulated with a sleeve of foam rubber (thermal conductivity of 0.03 W/mK). What thickness of insulation is needed to prevent condensation? Hint: begin by assuming laminar airflow around the pipe.
a mass-spring-damper system has a mass of 100 kg. its free response amplitude decays such that the amplitude of the
a horizontal circular cylinder of diameter d 0.2m and length 2m is elastically mounted on two springs and towing tank
A 20-mm diameter rod made of a ductile material with a yield strength of 350 MPa is subjected to torque of 100 N.m and a bending moment of 150 N.m. An axial force is then gradually applied. Determine the value of force when the rod begins to yield..
the snowmobile is traveling at 10m/s when it leaves the embankment at A.determine the speed at which it strikes the ground at B and its maximum acceleration along the trajectory AB.
a formula-1 car encounters a hump which has a circular shape with smooth transitions at either end. a what speed vb
Assuming that within metal crystals, the atoms can be considered as hard spheres in contact, sketch arrangement of atoms in a (100) plane, a (110) plane and a (111) plane of face-centered cubic structure. Determine the number of atoms contained wi..
a rigid well-insulated tank with a volume of 3 fe contains air at p1 22 lbfin2 and t1 475 bullr. the air is stirred by
steam at 300 degc travels through a pipe covered with two layers of insulation. the first layer of insulation is 3 cm
Determine the ideal launch vehicle that can put this orbiter into the parking orbit. (hint: you do not have to consider the Sun in this problem. Only SOI of the Earth and the Moon)
a water barometer was observed at a school on a recent trip. it was basically a tube filled with water in a container.
a piston- cylinder assembly with initial volume of 80 liters contains 4kg of r-134a at a pressure of 160 kpa state 1.
determine the location Yc of the centroid C of the beam cross sectional area . then compute the moment of inertia of the area about the x axis.
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