On a cold day a battery has a terminal voltage of V₁ = 11.93 V and an internal resistance of r₁ = 0.0085 . On a warm day the battery has a terminal voltage of V₂ = 11.71 V and an internal resistance of r₂ = 0.024 . The device it powers draws the same current at both temperatures. Assume the emf of the battery does not depend on temperature.

Part (a)Enter an expression for the current,I, in terms of the given quantities.

I=

33%Part (b)Calculate the current,I, in amperes. 33%Part (c)What is the battery's emf, in volts?