As we drill down into the rocks of Earth's crust, the temperature typically increases by 3.0 C for every 100 m of depth. Oil wells can be drilled to depths of 1790 m. If water is pumped into the shaft of the well, it will be heated by the hot rock at the bottom and the resulting steam can be used as a heat engine. Assume that the surface temperature is 23 C. Using such a 1790-m well as a heat engine, what is the maximum efficiency well possible? ewell = If a combination of such wells is to produce a 2.0-MW power plant, how much energy E will it absorb from the interior of Earth each day? E = J