1. The problem statement, all variables and given/known data a battery delivers nearly constant voltage of 1.5 V and stores about 10^4 joule of energy. 2. Relevant equations From time it takes you to use up the batteries in your calculator estimate the resistance of your calculator. 3. The attempt at a solution I really dont know the equations I need for this question, this was a review problem set from gr.11. I dont have the gr.11 physics text book and it's not on the gr12 textbook. Please post the equations I need for this question, thanks!