What percentage of the takeoff velocity did the plane gain when it reached the midpoint of the runway

Which boundary is associated with the building of the himalaya mountains? convergent transform divergent hot spot

Find v(t), given acceleration a(t)=7j and initial velocity v(0)=k

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.