The compressor in a certain carnot refrigerator performs 480 j of work to remove 150 j of heat from the interior of the refrigerator. how much heat must the coils behind the refrigerator discharge into the kitchen

I'm thinking it's 2 you are asked to explain the earth's magnetic field. which is the best reply? 1. the earth's magnetic south is similar to the north pole of a magnet. 2. the earth's core has a strong magnetic charge similar to the south pole of a magnet. 3. the earth's geomagnetic south is similar to the south pole of a magnet. 4. the earth's magnetic charge is not centered at either pole; it varies based on location.