Find the magnitude of the vector `vec(PQ)`, its scalar components and the component vectors along the co-ordinate axes, if P and Q have the co-ordinates
P(-1,30, Q(1,2)

Explanation

`vec(PQ) = (1+1)hati+(2-3)hatj = 2hati-hatj`
Scalar components of `vec(PQ)` are `2hati, -hatj`.
Magnitude of `vec(PQ) = |vec(PQ)| = sqrt5`.