webassign due in like half hour! i have the problem down...but its not working!!! 1. The problem statement, all variables and given/known data A steam iron draws 8.0 A when connected to a potential difference of 120 V. (a) What is the power rating of this iron? 960 W <<<<correct (b) How many joules of energy are produced in 20.0 min? 320 J <<<incorrect why??? (c) How much does it cost to run the iron for 20.0 min at $0.010/kW·h? .0032 $ <<<<correct 2. Relevant equations for part b: 960*(20/60) = 320 whys it wrong?!