Atotal solar eclipse is visible from
a. all over earth
. b. only within the moon’s umbra.
c. only within the moon’s penumbra.
d. only the dark side of earth.

What property is a characteristic of a substance that can be observed and does not change the identity of the substance

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