On average, the temperature of earth's crust increases 1.0 °c for every increase in depth of 30 m. the average thermal conductivity of earth's crust material is 0.74 j/(m · s · k). what is the heat loss of earth per second due to conduction from the core? how does this heat loss compare with the average power received from the sun? (the average power received from the sun on the earth is 1.37 kw/m^2.)