If a string vibrates at the fundamental frequency of 528 hz and also produces an overtone with a frequency of 1,056 hz, this overtone is the
a. first harmonic.
b. third harmonic.
c. fourth harmonic.
d. second harmonic.

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

What is the frequency if a wave that pases a given pount 22 times in 2 seconds

Aplane's average speed between two cities is 600 km/h. if the trip takes 2.5 hours, how far does the plane fly?