Can any physics formula be converted to a two-variable function; = ()? Provide at least two examples using electrostatics.

2. Given is an electric circuit with three resistors that can take fixed or variable resistance. a) Find a general expression to compute the circuit's total resistance.

b) Suppose that R1 and R2 are fixed and R3 . What is the total resistance of the circuit? Support algebraically your answer. c) Compare the potential difference on R2 and R3 if R1 and R2 are fixed and R3 .

d) Compare the electric current on R2 and R3 if R1 and R2 are fixed and R3