A solar heating system has a 25. 0% conversion efficiency; the solar radiation incident on the panels is 950 w/m2. What is the increase in temperature of 26. 0 kg of water in a 1. 00-h period by a 3. 00-m2-area collector? (cw = 4 186 j/kg⋅°c).

Zachary has been trying to work on an essay for almost three hours, be he can't seem to focus for more than 15 or 20 minutes at a time. what should he do so that the quality of his work doesnt suffer because of poor concentration and lack of energy