This week – Ch. 14 – Waves
Next week – Ch. 8 – Gravity
Homework due 11/26, 5 pm (both
chapters)
No labs or quiz next week
Quiz this week – Oscillations
[Natural frequency, relation between
amplitude, velocity, acceleration, energy]
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Waves Chapter: Oscillations, Resonance, and Wave Properties, Study notes of Physics
Information about the upcoming chapters in a physics course, including chapter titles, due dates for homework, and quiz topics. The focus is on waves, specifically oscillations and resonance, and covers properties such as wavelength, wave number, frequency, angular frequency, period, and speed. It also includes formulas for sinusoidal waves and examples of wave speeds in various media.
Typology: Study notes
Pre 2010
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This week – Ch. 14 – Waves
Next week – Ch. 8 – Gravity
Homework due 11/26, 5 pm (both
chapters)
No labs or quiz next week
Quiz this week – Oscillations
[Natural frequency, relation between
amplitude, velocity, acceleration, energy]
Resonance m^ d 2 x dt 2
=F
0 cos D t−kx
Waves – Physical changes that move
through space and change in time
Longitudinal
Conducting medium moves along wave
direction.
Sound, p-waves
Transverse
Medium moves perpindicular to wave
direction
Water waves, light, radio, s-waves
Wave Properties
Wavelength
Wave number
Frequency
Angular Frequency
Period
Speed
m k=
m − 1 f Hz cycles/sec s − 1 rad /sec http://phet.colorado.edu/simulations/sims.php?sim=Wave_on_a_String
T=
f
s v=f =
k m/s
Wave Speeds
Depend on medium “Stiffer” media have
faster waves. More massive media have
slower waves.
v SOUND
P
= 330 m/s air , STP v SOUND = 1500 m /s water v SOUND = 5000 m /s granite v LIGHT =c= 3 × 10 8 m/s vacuum v ROPE
F
m/s
If you double the wavelength λ of a wave on a string, what happens to the wave speed v and the wave frequency f? A. v is doubled and f is doubled B. v is doubled and f is unchanged C. v is unchanged and f is halved D. v is unchanged and f is doubled E. v is halved and f is unchanged
Formulae for sinusoidal waves
y=A cosk x− t y=A cos
x−
T
t
A wave on a string is moving to the right. This graph of y ( x, t ) versus coordinate x for a specific time t shows the shape of the wave at that time. What are the velocity and acceleration of a particle at point Q on the string? A. velocity is upward and acceleration is zero B. velocity is downward and acceleration is zero C. velocity is zero and acceleration is upward D. velocity is zero and acceleration is downward E. none of the above