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.)

Which situation will produce the greatest change of momentum

Which of these is constant for all types of electromagnetic radiation in a vacuum? select one: a. wavelength b. frequency c. photon energy d. amplitude e. velocity

Currents in dc transmission lines can be 100 a or higher. some people are concerned that the electromagnetic fields from such lines near their homes could pose health dangers. for a line that has current 150 a and a height of 8.0 m above the ground, what magnetic field does the line produce at ground level? express your answer in teslas and as a percentage of the earth’s magnetic field, which is 0.50 g. is this value cause for worry?