Aconcentric annulus tube has inner and outer diameters of 25 mm and 100 mm, respectively.
liquid water flows at a mass flow rate of 0.05 kg/s through the annulus with the inlet and outlet mean temperatures of 20â°c and 80â°c, respectively.
the inner tube wall is maintained with a constant surface temperature of 120â°c, while the outer tube surface is insulated.

determine the length of the concentric annulus tube.

assume flow is fully developed.

Two flowing streams of argon gas are adiabatically mixed to form a single flow/stream. one stream is 1.5 kg/s at 400 kpa and 200 c while the second stream is 2kg/s at 500 kpa and 100 ? . it is stated that the exit state of the mixed single flow of argon gas is 150 c and 300 kpa. assuming there is no work output or input during the mixing process, does this process violate either the first or the second law or both? explain and state all your assumptions.

What is the major difference between thermoplastics and thermosetting plastics from the polymerization structure point of view?

A75mm diameter shaft is supported in a journal bearing 75mm long with a diametral clearance of 0. 1mm. it supports a radial load of 1000 n and is lubricated with sae 50 oil at 70°c. find the friction torque and the power loss when the crankshaft rotates at 2900 rev/min.