|
-
-
-
.
..
...
...
....
.....
......
.....
....
...
.....
......
........
......
....
...
.
.
.
.
.
.
...
.
.
.
.
.
.
.
..
.
.
.
..
.
....21.
.
.
.
21
-
-
East is a direction in geography. It is one of the four cardinal directions or compass points, opposite of west and at right angles to north and south. East is the direction toward which the Earth rotates about its axis, and therefore the general direction from which the Sun appears to rise.
-
Direction is the information contained in the relative position of one point with respect to another point without the distance information. Directions may be either relative to some indicated reference (the violins in a full orchestra are typically seated to the left of the conductor), or absolute according to some previously agreed upon frame of reference (New York City lies due west of Madrid). Direction is often indicated manually by an extended index finger or written as an arrow. On a vertically oriented sign representing a horizontal plane, such as a road sign, "forward" is usually indicated by an upward arrow. Mathematically, direction may be uniquely specified by a unit vector in a given basis, or equivalently by the angles made by the most direct path with respect to a specified set of axes.
-
-
Distance is a numerical description of how far apart objects are. In physics or everyday discussion, distance may refer to a physical length, a period of time, or an estimation based on other criteria (e.g. "two counties over"). In mathematics, distance must meet more rigorous criteria.
In most cases there is symmetry and "distance from A to B" is interchangeable with "distance between B and A".
-
Physics, in everyday terms, is the science of matter [1] and its motion; the science that deals with concepts such as force, energy, mass, and charge for example. More accurately, it is the general analysis of nature, conducted in order to understand how the world around us behaves.
-
|
» Site Navigation
» Friends
» Sponsors
|
