What must occur within a magnetic material before it exhibts magnetic properties? a)The material must be of a specific size
b)The material must be charged with electricity
c) The magnetic domains inside the material must be aligned
d) The magnetic material must be created artificially

(real answers only or you will be reported. Thanks to those who help).

Nitrogen (n2) undergoes an internally reversible process from 6 bar, 247°c during which pν1.2 = constant. the initial volume is 0.1 m3 and the work for the process is 121.14 kj. assuming ideal gas behavior, and neglecting kinetic and potential energy effects, determine heat transfer, in kj, and the entropy change, in kj/s. show the process on a t-s diagram.