## What does XY-plane mean?

## What does XY-plane mean?

The xy-plane is the plane that contains the x- and y-axes; the yz-plane contains the y- and z-axes; the xz-plane contains the x- and z-axes. These three coordinate planes divide space into eight parts, called octants.

## What is a constant coordinate surface?

In three-dimensional space, if one coordinate is held constant and the other two are allowed to vary, then the resulting surface is called a coordinate surface. For example, the coordinate surfaces obtained by holding ρ constant in the spherical coordinate system are the spheres with center at the origin.

**What is differential area?**

In any coordinate system it is useful to define a differential area and a differential volume element. In cartesian coordinates the differential area element is simply dA=dxdy (Figure 10.2.

**What is differential displacement?**

differential displacement vector is a directed distance, thus. the units of its magnitude must be distance (e.g., meters, feet). The differential value dφ has units of radians, but the. differential value d. ρ φ does have units of distance.

### How many coordinates are there?

three

There are three commonly used coordinate systems: Cartesian, cylindrical and spherical. In this chapter, we will describe a Cartesian coordinate system and a cylindrical coordinate system.

### What is coordinate of a point?

Coordinates Definition. A pair of numbers that describe the exact position of a point on a cartesian plane by using the horizontal and vertical lines called the coordinates. Usually represented by (x, y) the x value and y value of the point on a graph. Every point or an ordered pair contains two coordinates.

**What is the range of phi in spherical coordinates?**

between 0o to 360o

Range of Phi (ϕ) coordinate. And the vertical half plane stuck to the Z axis, to contain that point, could have any orientation within 360 degrees. Hence, Phi can take any value between 0o to 360o or 0 to 2π.