Chapter
2 Wave Relationships
(many thanks to the HyperPhysics website) 



A
body will undergo SIMPLE
HARMONIC MOTION when the force that tares to restore the object to
its rest position is proportional to the displacement of the object. A
pendulum and a mass on a spring both undergo this type of motion which
can be described by a SINE WAVE


As
you watch an object at the end of a swinging pendulum or
an object on the end of an oscillating spring, you can 'see'
the
Conservation of Energy Principle in action. In either case, when the object changes direction it momentarily 'stops' and the total energy resides in Potential Energy. As the object speeds up in it's swing or oscillation there is a point at which it is moving as fast as it will move, at this point the total energy resides in Kinetic Energy. Total Energy = Potential Energy + Kinetic Energy 



In sound applications, a resonant frequency is a natural frequency of vibration determined by the physical parameters of the vibrating object. This same basic idea of physically determined natural frequencies applies throughout physics in mechanics, electricity and magnetism, and even throughout the realm of modern physics.  




Questions
from Chapter 2


1) Explain Resonance
Frequency using two examples.
2) How many grams
of water are there in a cubic meter container?
Knowing
Fourier
Analysis will make you smart and valuable

