A wind turbine with circular blades of diameter 30 m operates steadily under the average wind speed of 20 m/s. Assuming that the density of the air is constant, being 1.14 kg/m3,
(4a) (4p) Please find the volumetric and mass flow rates of the air through this turbine.
(4b) (4p) Also, please find the maximum power production of this turbine

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.

Which of the following components of a pid controlled accumulates the error over time and responds to system error after the error has been accumulated? a)- proportional b)- derivative c)- integral d)- on/off.

Prove the equivalence between the two statements of the 2nd law of thermodynamics (i.e., a violation of one statement leads to the violatio the other statement)