A simple harmonic oscillator has an amplitude of 3.4 cm and a maximum speed of 25.5 cm/s. What is its magnitude of the displacement in cm when the speed is 6 in cm/s

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.