If two resistors with resistances R1 and R2 are connected in parallel, then the total resistance, R, measured in ohms (Omega sign) is given by: (1/R)=(1/R1)+(1/R2). If R1 is increasing at a rate of .2 ohms/s and R2 is increasing at a rate of .3 ohms/s, how fast is R changing when R1= 80 ohms and R2= 100 ohms.

Consider the following circuit diagram. The potential difference across the battery is 40.0 volts, and it supplies a current of 5.00 amperes to the circuit. There is a current of of 2.70 amperes flowing through R1. Resistor R2 has a resistance of 5.50 ohms. What is the resistance of R3? Answer in ohms to two decimal places, but do not include units in your answer.

The resistance R to the flow of blood varies directly with a blood vessels length L and inversely with the 4th power of its radius r. If R = 144 when L = 24 and r = .5 find an equation relating R, l, and r. Find R if L = 6 and r = .25.

I1 = 9 A, I2 = 2 A, I3 = 13 A The total current I in this circuit in Amps is: ______ I1 = 9 A, I2 = 2 A, I3 = 13 A If V = 100 V, find the voltage drop across R1 in V. ______ I1 = 9 A, I2 = 2 A, I3 = 13 A If V = 100 V, find the voltage drop across R2 in V. ______ I1 = 9 A, I2 = 2 A, I3 = 13 A If V = 100 V, find the voltage drop across R3 in V. ______