A student drops a heavy ball off the top a building. The ball reaches a speed of 46m/s just before striking the ground. Neglect drag. Determine all unknowns.

vo=
m/s
v=
m/s
vf=
m/s

In an experiment, how can i change human errors? be specific.

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

Efficiency is the ratio of to for a system a)power in to power in b)power in to power out c) power out to power out d) power out to power in