A(n) 7.6 g object moving to the right at 20 cm/s makes an elastic head-on collision with a 23 g object moving in the opposite direction at 45 cm/is. 7.6 g 20 cm/s 23 g 45 cm/s Find the velocity of the first object immediately after the collision. Answer in units of cm/s.

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.