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# How are spherical coordinates written?

## How are spherical coordinates written?

Since r=ρsinϕ, these components can be rewritten as x=ρsinϕcosθ and y=ρsinϕsinθ. In summary, the formulas for Cartesian coordinates in terms of spherical coordinates are x=ρsinϕcosθy=ρsinϕsinθz=ρcosϕ.

What is magnitude of unit vector r in spherical coordinates?

In spherical coordinates, one of the coordinates is the magnitude! Recall (r,θ,ϕ) are the Spherical coordinates, where r is the distance from the origin, or the magnitude. You can see here. In cylindrical coordinates (r,θ,z), the magnitude is √r2+z2.

### What is rho in spherical coordinates?

1 Spherical Coordinates ρ = rho = distance from origin φ = phi = angle down from + z-axis. Page 1. 1. Spherical Coordinates.

How do you convert coordinates into vectors?

Just as in two-dimensions, we assign coordinates of a vector a by translating its tail to the origin and finding the coordinates of the point at its head. In this way, we can write the vector as a=(a1,a2,a3).

#### What is the unit normal vector of a sphere?

Sphere with inward normal vector. The sphere of a fixed radius R is parametrized by Φ(θ,ϕ)=(Rsinϕcosθ,Rsinϕsinθ,Rcosϕ) for 0≤θ≤2π and 0≤ϕ≤π. In this case, we have chosen the inward pointing normal vector n=(−sinϕcosθ,−sinϕsinθ,−cosϕ), orienting the surface so the inside is the positive side.

The radius of curvature of a curve C at a point P is defined as the reciprocal of the absolute value of its curvature: ρ=1|k| The LATEX code for ρ is \rho .

## What is the spherical coordinate?

spherical coordinate system, In geometry, a coordinate system in which any point in three-dimensional space is specified by its angle with respect to a polar axis and angle of rotation with respect to a prime meridian on a sphere of a given radius.

How to find velocity in spherical coordinates?

– Radial: ¨r − r˙θ2 − rsin2θ˙ϕ2 – Meridional: r¨θ + 2˙r˙θ − rsinθcosθ˙ϕ2 – Azimuthal: 2˙r˙ϕsinθ + 2r˙θ˙ϕcosθ + rsinθ¨ϕ

### What is Z in spherical coordinates?

z = ρcosφ r = ρsinφ z = ρ cos φ r = ρ sin φ and these are exactly the formulas that we were looking for. So, given a point in spherical coordinates the cylindrical coordinates of the point will be, r = ρsinφ θ = θ z = ρcosφ r = ρ sin φ θ = θ z = ρ cos φ Note as well from the Pythagorean theorem we also get, ρ2 = r2 +z2 ρ 2 = r 2 + z 2

What is the cross product in spherical coordinates?

The direction of the cross product is given by the right-hand rule: Point the fingers of your right hand along the first vector ( →v v → ), and curl your fingers toward the second vector ( →w w → ). You may have to flip your hand over to make this work. Now stick out your thumb; that is the direction of →v × →w. v → × w →.