Air flows through a combustion chamber held at 1145k and 101.3 kpa. oxygen diffuses through a 1.5 mm thick stagnant film of air to a flat carbon surface where it reacts instantaneously to form carbon monoxide. no reaction occurs in the gas film. the diffusivity of oxygen in the gas film is 1.30x10-4 m2 /s. what is the rate of oxygen diffusion to the surface?

Apiston-cylinder with a volume of 0.25 m3 holds 1 kg of air (r 0.287 k/kgk) at a temperature of 100 c. heat transfer to the cylinder causes an isothermal expansion of the piston until the volume triples. how much heat is added to the piston-cylinder?

What precautions should you take to prevent injuries when dealing with heavy loads?

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.