Who grants licenses to be a Barber?

An object moves from position +34m to the position -15m in 15 seconds. what is the total displacement? what is the total velocity?

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.

Properties seen when one one substance changes to another are known as properties