1. Warm-Up 11/18/13 Sketch the following:
Transverse wave with long wavelength, and one with a short wavelength
Transverse wave with high frequency, and one with a low frequency
Transverse wave with high amplitude, and one with a low amplitude

2. Wave Properties: Speed

3. What Affects wave speed?
The medium
Sound is faster in liquids & solids
Light is faster in gases and empty space
The temperature
Sound is faster in warmer temps

4. What affects wave speed cont.
Why do you think this is?
Sound waves rely on matter colliding with other bits of matter
Solids/liquids have matter closer together
Heat makes atoms move faster
Light is not mechanical
Matter blocks light waves!

5. Calculating Wave Speed
Equation: ν=f λ
ν is wave speed (velocity, m/s)
f is frequency (Hz, 1/s)
λ is wavelength (m)

6. Example
What is the speed of a sound wave that has a wavelength of 2.00m and a frequency of Hz?
Identify the variables: f=170.5 Hz and λ=2.00m
Plug into the equation: ν=f λ so ν=(170.5Hz)(2.00m)=( /s)(2.00m)
Solve: ν=341 m/s

7. QUIZ tomorrow on wave types and parts!
Your Job
QUIZ tomorrow on wave types and parts!
Finish the “Wave Speed” section of Friday’s worksheet + 3 speed calculations. STAPLE & TURN IN TODAY.
ALL STUDENTS must complete test corrections for Work, Power, and Energy. ALL STUDENTS will do a retake of corrected problems on Wednesday in class.