Given: r = {v3, v5, v7, v13} . why is r not a relation?
r is a series
r is a sequence
r is not a set of ordered pairs
r is a set of rational numbers

Identify the theory that can be used to explain each phenomenon. answers diffraction: wave theory interference: wave theory reflection: both particle and wave theories refraction: both particle and wave theories

Apulley with mass mp and a radius rp is attached to the ceiling, in a gravity field of 9.81 m/s2 and rotates with no friction about its pivot.

This is the number of complete movements of a wave per second.