094 • 17 October 2014 • Name:

1. A RipStik will be swizzled ("wiggled") across a poster paper. Use the values on the paper to answer the following questions.
   1. _________ How many wavelengths are shown?
   2. λ = _________ _________ Calculate the wavelength λ of one wave in centimeters.
   3. a = _________ _________ Calculate the amplitude a.
   4. τ = _________ _________ Calculate the period τ.
   5. f = _________ _________ Calculate the RipStik swizzle wave frequency f.
2. 8:00 lab: A clapper clapping in synch with the echo claps 25 times in ten seconds during laboratory nine. The distance to the building and back was 136 meters.
   1. velocity ѵ = _________ _________ Based on this data, what is the experimental speed of sound?
   2. percent error = _________ Given that the actual speed of sound that day was 350 m/s, what is the percentage error?
3. 11:00 lab: The time between a timer seeing a clap and hearing a clap was 1.2 seconds. The clapper and the observer were 408 meters apart.
   1. velocity ѵ = _________ _________ Based on this data, what is the experimental speed of sound?
   2. percent error = _________ Given that the actual speed of sound that day was 350 m/s, what is the percentage error?

$\text{slope m}=\frac{(\mathrm{y2}-\mathrm{y1})}{(\mathrm{x2}-\mathrm{x1})}$
distance d = velocity ѵ * time t
period τ = 1 ÷ (frequency f )
$\text{percent error}=\frac{(\text{experimental value}-\text{expected value})}{\left(\text{expected value}\right)}$