In the case of the motor it is the rotor and the stator and for the pump it is the impeller and the volute (or diffuser). Of course the friction produced by bearings and other mechanical components (seals, stuffing box, etc) also affect pump efficiency, but the impeller and volute have the greatest influence. Lets start our investigation of centrifugal pump efficiency with the impeller.
The only difference between sport coats and blazers is that blazers are always solid-colored, usually blue, black, camel or dark green, while sport coats encompass about everything else. Blazers are considered more basic and more formal than sport coats. Photo Credit Jupiterimages/Brand X Pictures/Getty Images.
Cloak vs Cape. The difference between cloak and cape has to do with the appearance of each clothe and the purpose for which we wear the clothe. A cape is more worn for fashion while a cloak is worn to protect the wearer from the elements such as rain and dirt. A cloak is a dress that is mostly one piece and covers the top portion of a person completely.