Analyzing a real battery: Part 2. A real battery has some internal resistance in series...

Analyzing a real battery: Part 2. A real battery has some internal resistance in series with an ideal battery with an emf of .In an attempt to determine and of such a battery, the voltage across the battery terminals is measured with the battery disconnected from any circuit elements and is found to be 9.50 V. A resistor with is then connected across the battery terminals, and the voltage across the terminals is found to be 8.10 V. Find the internal resistance of the battery. Note: We give extra significant figures for the measured voltages so that the final answer will have two significant figures.