How are we able to break wire by repeated bending

If jill was traveling at 300 miles in 4 hours due south what was his velocity in miles per minute a) 75 miles per hour due south b) .02 miles per second due south c) .5 miles per second due south d) 1 mile per hour due south

Phase changes are chemical changes. true or false

Velocity is a description of both speed and direction, therefore it - a vector - a force arrow - the same as acceleration - a magnitude