posted by Cynthia .
Part of a circuit has two resistors connected in parallel as shown in the figure. R(1) is a constant resistor of 10 ohm, while R(2) is a variable resistor with resistance that varies at a rate of 2 ohms per minute. The total, or effective, resistance, R, provided by this circuit is given by:
At what rate does the effective resistance change when R(2) is 100 ohms? Round off your answer to four decimal places.