A football quarterback runs 13 m straight down the playing field in 2.2 s (in the positive direction). He is then hit and pushed 2.5 m straight backwards in 1.8 s. He breaks the tackle and runs straight forward another 23 m in 4.8 s. show answer No Attempt 25% Part (a) Calculate the quarterback's average velocity in the horizontal direction during the first interval, in 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.