27. A body is projected with a velocity 40ms-1. After two seconds, it crosses a vertical pole of length 20.4 m.1 Calculate the angle of projection. (Take g = 9.8 ms-2) [Ans. 300​

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.