STUDY
GUIDE

PRESSURE:
(Chap 9)

Bernouilli’s
principle

Simple
Harmonic Oscillators:

Restoring
Force proportional to distance

Energy,
velocity and displacement all make a wave pattern.

Back
& forth, up & down, revolution, cycle, wave, swing, all the same

Period:
time per cycle

Frequency:
1/Period= cycle per sec = Hertz

In a
pendulum: T = 2 pi * sqrt ( length/ g)

In a
spring T = 2 pi * sqrt ( m/ k) k is spring constant

MOVING
WAVES: (Chap 12)

I. Waves in general:

A.
Definition of wave: disturbance through a medium

B.
Parts of a wave/ measurements of a wave

a. crest (high
point), trough(low point)

b.
wavelength(crest to crest), amplitude(1/2 total height),

c.frequency(#
waves per second), speed (distance per time)

d.SPEED: CHANGES WITH
TEMPERATURE

C.
Transverse Waves

a. Points
move perpendicular to wave motion, b. crest, trough

D.
Longitudinal Waves

a. Points
move with wave motion, b. compression, rarefaction

How does
changing these properties affect slinky/rope or water waves?

Remember
that Speed = Frequency times Wavelength

Tightness
in a rope/Depth of Water >>>>> changes speed

Type of
Material >>>>>> changes speed

Changing
Frequency>>>>> changes wavelength NOT speed

Changing
Amplitude (Strength/Height)>>> does NOT change frequency, wavelength
or speed.

REFLECTION:

Waves
bounce off a barrier in the opposite direction

REFRACTION:

Waves
change direction when they go from one material to another (because of change
in speed), like in a wave between two slinkys or from one depth of water to
another.

INTERFERENCE:
When two waves meet they will either
cancel or add up to a stronger one.

STANDING
WAVES: when the intereference and the frequency are adjusted so that points or
nodes appear not to move.

Wave
interactions…. Follow principle of superposition (waves add up)

A wave of
.25 cm amplitude with a wavelength of 2 m traveling on a string interferes with
a wave of .10 cm amplitude with a wavelength of 4 m traveling the other way on
the 4 m long string. (they both were started at the same time). The waves
travel 20 m/s.

Sketch a
graph of each individual wave for one period.

Sketch a
graph of the wave resulting from interference.

Give
examples of simple harmonic motion

Describe
exactly how to change the period of a pendulum

Describe
the factors that affect the speed of a wave spring

Describe
how water, pendulum, slinky waves are alike and different.

Graph the
acceleration and energy of a spring wave.

Describe
how to make a node

Describe
the difference between free and closed reflection

Explain
the parts of a transverse and longitudinal wave, giving examples.

What is
the principle of superposition?

Explain
how Bernoulli’s principle can be thought of as restating conservation of energy

Describe
how airplanes fly, giving the forces and their effect on each other.