An object of mass 0.67 kg is attached to a spring with spring constant 15 n/m. if the object is pulled 14 cm from the equilibrium position and released.
what is the maximum speed of the object?

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.