In a solar water heater, energy from the sun is gathered by water that circulates through tubes in a rooftop collector. the solar radiation enters the collector through a transparent cover and warms the water in the tubes; this water is pumped into a holding tank. assume that the efficiency of the overall system is 15.0% (that is, 85% of the incident solar energy is lost from the system). what collector area is necessary to raise the temperature of 210 l of water in the tank from 16°c to 41°c in 2.1 h when the intensity of incident sunlight is 790 w/m2? the specific heat of water is 4186 j/kg·k. the density of water is 1.00 g/cm3.