A 1 kg rock is at a height of 50 meters. what is its gravitational potential energy?

The air that we breath is made mostly of which gaseous molecule

What determines the amount of inertia an object has

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