Asample of water is heated with 5000 j of energy and its temperature goes up by 6 k. what is the mass of the sample?
a. 199 g
b. 149 g
c. 249 g
d. 299 g

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.