What causes the earth’s magnetic field? a. circulation of van allen belts around the planet b. presence of charged particles in the inner core c. charged particles from solar wind hitting the magnetosphere d. movement of charged particles in the outer core

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.