What is one reason why rock layers are not horizontal

Current enters a circuit at a: 1.positive terminal 2.negative terminal 3.low potential side 4.resistor

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 .

Dao makes a table to identify the variables used in the equations for centripetal acceleration. what quantities belong in cells x and y?