Athletic equipment companies have produced aquatic dumbbells that are less dense than water such that they provide an upward force when submerged. your goal is to design a dumbbell that provides a force that is equal in magnitude whether it is submerged or in the air by combining polyurethane foam (300 kg/m^3) and a steel bar of radius 2 cm (8000 kg/m^3). propose a design and report the fraction of the total mass of each dumbbell that is polyurethane.

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.

Draw the engineering stress-strain curve for (a) bcc; (b) fcc metals and mark important points.

What is the main objective of using reheat rankine cycle?