True or false: for a low-pressure system to strengthen, the surface air pressure must decrease. select one:
a. true
b. false

How does the amount of energy required to hold each proton and neutron in the nucleus compare to the energy released when they are removed?

Which pair of quantities includes one quantity that increases as the other decreases during simple harmonic motion?

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