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phy123:lab_8 [2009/11/11 21:14]
mdawber
phy123:lab_8 [2009/11/17 17:48] (current)
mdawber
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 The purpose of this lab is to study standing waves on a vibrating string. The purpose of this lab is to study standing waves on a vibrating string.
 +
 +[[http://​www.ic.sunysb.edu/​Class/​phy122ps/​labs/​dokuwiki/​pdfs/​lab8worksheet.pdf|Important! You need to print out the 2 page worksheet you find by clicking on this link and bring it with you to your lab session.]]
 +
 +If you need the .pdf version of these instructions you can get them [[http://​www.ic.sunysb.edu/​Class/​phy122ps/​labs/​dokuwiki/​pdfs/​phy123lab8.pdf|here]].
  
 ===== Video ===== ===== Video =====
  
-Coming Soon.+<​flashplayer width=640 height=480>​file=http://​www.ic.sunysb.edu/​Class/​phy122ps/​labs/​phy121vid/​phy123lab8.flv</​flashplayer>​ 
  
 ===== Equipment ===== ===== Equipment =====
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 {{lab8fig2.jpg?​600}} {{lab8fig2.jpg?​600}}
 +Fig 2.
  
 The equation for the velocity of a travelling wave on a string is  The equation for the velocity of a travelling wave on a string is 
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-$\Large \frac{1}{2}\frac{\Delta v}{v}=\frac{\Delta \mu}{\mu}$+$\Large \frac{\Delta v}{v}=\frac{1}{2}\frac{\Delta \mu}{\mu}$
 </​WRAP>​ </​WRAP>​
 <WRAP column 10%> <WRAP column 10%>
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 +Write down the slope of the graph k and it's error. Use this to calculate g the acceleration due to gravity ( From equation (8.7), $k=\frac{3^2}{(2L)^2}\frac{g}{\mu}$ ). To calculate the error in your measurement of g we neglect the error in L and and use the fact that the relative error in g will be due to the relative error in the slope, $\frac{\Delta k}{k}$, and the relative error in $\mu$, $\frac{\Delta \mu}{\mu}$ and from equation (1.7) of Lab 1 will be $\frac{\Delta g}{g}=\sqrt{(\frac{\Delta k}{k})^2+(\frac{\Delta \mu}{\mu})^2}$.
  
-Write down the slope of the graph k and it's error. Use this to calculate g the acceleration due to gravity ( From equation (8.7) $k=\frac{3^2}{(2L)^2}\frac{g}{\mu}$). To calculate the error in your measurement of g we neglect the error in L and and use the fact that the relative error in g will be due to the relative error in the slope, $\frac{\Delta k}{k}$, and the relative error in $\mu$, $\frac{\Delta \mu}{mu}$ and from equation (1.7) of Lab 1 will be $\frac{\Delta g}{g}=\sqrt{(\frac{\Delta k}{k})^2+(\frac{\Delta \mu}{\mu})^2}$+Once you have your value for g and it's error compare it to the established valueIs it consistent with that?
phy123/lab_8.1257992074.txt · Last modified: 2009/11/11 21:14 by mdawber
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