A flat-plate water heating collector has the following characteristics: Plate: copper, 0.026-cm-thick, 15-mm-diameter tubes on 80-mm centers, an = 0.93, = 0.11, m/A = 0.0080 kg/m s Covers: one glass, KL for the cover 0.0125, spaced 25 mm from the plate Insulation on back and edge: Ube = 0.82 W/m C Collector orientation: 60 slope to south a Conditions of operation: T = 10C, wind heat transfer coefficient 20 W/m C, T; = 35C, h = 300 W/m C = For an hour in which IT 2.60 MJ/m and the radiation is nearly normal to the plane of the collector, estimate Qu/A.