General Physics Question 1 (1 point) Good photovoltaic cells have an efficiency of approximately ________ Question 1 options: a) 2-6% b) 28-38% c) 14-17% d) 38-58% Save Question 2 (1 point) Hydroelectric power in the U.S. currently represents about ______ % of the total U.S. electricity. Question 2 options: a) […]