Khan Academy: Calculus: Constructing a Unit Normal Vector to a Curve

Video showing how to construct the unit normal vector to a surface for any point on a curve by first showing how to find any normal vector and from there finding the unit normal vector. Includes an explanation of how to find the...

Video using the information about unit normal vectors to represent the surface integral for finding flux through a surface in two dimensions in a different way. The video also uses partial derivatives and the second definition of the...

Deriving a unit normal vector from the surface parametrization

Video showing how to find the closed line integral of the dot product of a vector field and a unit normal vector to figure out how fast particles are exiting the region formed by the closed curve. Green's theorem is applied and the...

Video explaining flux through a two-dimensional surface by relating it to line integrals in two dimensions. Sets up a surface integral of the dot product of the product of a mass density function and velocity function with the unit...

Video demonstrating how to calculate curl for a specific three-dimensional vector field. [10:17]

Video solving for the shortest distance between a point and a plane by building from the previous video where the normal vector to the plane is found. Distance is calculated by finding the dot product of the vector from the given point...

Video finding the normal vector to a plane using its equation by first visualizing the vector and the plane and then solving for it. Shows how to find the equation of a plane given the position vectors of two points on the plane and...

Video lesson defining the derivative of a position vector valued function by visualizing it and setting it up. [14:45]

At this site from Math World you can find out various normal vector formulas, including normal vectors of planes, surfaces, tangent vectors, and three dimensional surfaces. This site also explains how the unit normal vector is derived.