Mary takes a trip to California for her vacation. Her airplane leaves Boston and flies 3,000 miles west, arriving in San Francisco 6 hours later. What was the plane’s velocity? Calculate and include proper units!

An object resting on a table weighs 100 n. with what force is the object pushing on the table? with what force is the table pushing on the object? explain how you got your answer.

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

How can waves travel through ground?