When a particle falls through the air, its initialacceleration a = g diminishes until it is zero, and thereafter itfalls at a constant or terminal velocity vf. If thisvariation of the acceleration can be expressed as a =(g/vf^2)(vf^2 - v^2), determine the timeneeded for the velocity to become v < vf . Initiallythe particle falls from rest.

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.

Find the minimum film thickness for a journal bearing with the data below. shaft diameter, d-50 mm, clearance ratio, cdratio? 0.001, shaft speed, n 2000 rpm; bearing length. i 200 mm; eccentricity ration, ? -0.55. ( note, cdratio-ca/d) the minimum film thickness is um

How to increase the thermal officiency of an ideal simple rankino cycle? among these methods, which one is the best and why?