Which greenhouse gas is produced by commercial refrigeration and air conditioning systems? carbon dioxide
fluorinated gas
nitrous oxide
methane

What is the momentum of a 2 kg object moving at 15 meters per second

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.

Which lists the pairs of plates in order from least to greatest in terms of the work done to move the electron?