Nitrogen at 100 psia and 300°F in a rigid container is cooled until its pressure is 80 psia. Determine the work done and the heat transferred during this process, in Btu/lbm. Take cv = 0.177 Btu/lbm·R at room temperature, for nitrogen.

Afull journal bearing has a journal diameter of 27 mm, with a unilateral tolerance of -0.028 mm. the bushing bore has a diameter of 27.028 mm and a unilateral tolerance of 0.04 mm. the l/d ratio is 0.5. the load is 1.3 kn and the journal runs at 1200 rev/min. if the average viscosity is 50 mpa-s, find the minimum film thickness, the power loss, and the side flow for the minimum clearance assembly.

The higher the astm grain size number, the finer the gran is. a)-true b)-false

Starting wih an energy balance on a rectangular volume element, derive the one- dimensional transient heat conduction equation for a plane wall with constant thermal conductivity and no heat generation.