What would happen if there were no action-reaction forces in effect and you tried walking down a sidewalk

In the first law of thermodynamics, triangle e=q-w, what does q stand for

If angle "a" is 25°, angle "b" is: a) equal to angle c b) less than angle c c) greater than angle c

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.