Consider isentropic fl ow in a channel of varying area, from section 1 to section 2. We know that Ma1 5 2.0 and desire that the velocity ratio V2/V1 be 1.2. Estimate (a) Ma2 and (b) A2/A1. (c) Sketch what this channel looks like. For example, does it converge or diverge

The y form of iron is known as: a) ferrite b) cementite c) perlite d) austenite

Which of the following controllers anticipates the future from the slope of errors over time? a)-proportional b)-on/off c)-integral d)-derivative.

True or false (explain) (110)[111] is a slip system in bcc metals . the {111} family in fcc contains 8 planes. resolved shear stress (rss) in single crystals is just related to the applied stress. critical resolved shear stress (crss) in single crystal metals is direct proportional to the number of defects in the structure