I need and friend is there is anyone

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

Burgers vector is generally parallel to the dislocation line. a)-true b)-false

Acertain flow of air (at stp) has a velocity distribution given by v i (in ft/s). if this flow is going through a 4 ft square area in the yz-plane (centered at the origin), what is the mass flow rate (in lbm/s)?