A Newtonian Fluid flows steadily and continuously at 100oF through a 4500 foot horizontal pipe with constant cross-sectional area of 12.56 in2 . This fluid has a density of 53.6 lbm/ft3 , heat capacity of 0.420 BTU/lbm F and kinematic viscosity of 6.15x10-6 ft2 /sec. This pressure drop across the pipe under these conditions is 300 lbf/ft2 . Assuming fully developed, parabolic, laminar, incompressible flow, please calculate the maximum velocity and volumetric flow rate of the fluid in the pipe.

On a average work day more than work place firs are reorted

Air is to be cooled in the evaporator section of a refrigerator by passing it over a bank of 0.8-cm-outer-diameter and 0.4-m-long tubes inside which the refrigerant is evaporating at -20°c. air approaches the tube bank in the normal direction at 0°c and 1 atm with a mean velocity of 4 m/s. the tubes are arranged in-line with longitudinal and transverse pitches of sl- st 1.5 cm. there are 30 rows in the flow direction with 15 tubes in each row. determine (a) the refrigeration capacity of this system and (b) pressure drop across the tube bank. evaluate the air properties at an assumed mean temperature of -5°c and 1 atm. is this a good assumption?

Aplate clutch has a single pair of mating friction surfaces 250-mm od by 175-mm id. the mean value of the coefficient of friction is 0.30, and the actuating force is 4 kn. a) find the maximum pressure and the torque capacity using the uniform-wear model. b) find the maximum pressure and the torque capacity using the uniform-pressure model.