If the velocity profile of a fluid emerging from a control surface varies with surface area, the control volume form of the momentum equation can be used. (t/f)

False

Explanation:

For different diameter pipes flow rate remains constant but velocity is different. (from continuity A1V1= A2V2). As area changes the velocity of fluid changes

a. a primary source combines several different accounts of an event. b. a primary source generally benefits from having been written after an event.

explanation:

first one is the correct answer