a train is stopping at the next station. Its moving at 20 m/s and is decelerating at a rate of 2 m/s^2 ? How far will the train move until is comes to a stop ?

How does the space charge width change with forward and reverse bias? also, calculate the space charge width for a reverse bias of 4v on a silicon pn junction at t = 300k and doping concentrations of na = 5x1015cm-3 , nd = 5x 1016 cm-3 .

Which feature of a heating curve indicates a change ofn state

Imagine that someone pushes one marble toward a motionless marble. would there still be action-reaction forces involved in the collision? how might the marbles’ motions be changed? ?