Declining estrogen levels can trigger severe pain in the lower lumbar region. The lower back pain due to estrogen deficiency can best be described as excruciating pain which radiates down the buttocks and legs. The incapacitating lower back pain may also hamper every day tasks.
A Position vector is a vector that describes position of a point in space. Often the position of such a point is nothing but the x,y, and z coordinates of the point with origin as the reference point. The direction of such a vector is the arrow or...
A vector is what is needed to carry the point A to the point B; the Latin word vector means carrier. It was first used by 18th century astronomers investigating planet rotation around the Sun. The magnitude of the vector is the distance between the two points and the direction refers to the direction of displacement from A to B.