A wire carrying a current of 5.3 A is at an angle of 45° relative to a magnetic field of 0.68 T.
What is the force exerted on a 1.5-m length of the wire?​

Suppose that f : rn → rm and that a ∈ k, where k is a connected subset of rn . suppose further that for each x ∈ k there exists a δx > 0 such that f(x) = f(y) for all y ∈ bδx (x). prove that f is constant on k; that is, f(x) = f(a) for all x ∈ k