Thermal Expansion Problem

Thermal Expansion Problem
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  • Bridge stuff explained by a someones hand
  • Almost, we have one problem though...
  • Let me show you
  • Is the bridge done yet?
  • What is it?
  • ???
  • We put small gaps in bridges so they may expand when it gets hot, and Tom, lost some of the papers containing the information to tell us how wide they should be. *Mutters: 'Cmon Tom*
  • Talking Hand
  • When it's 22ºC , the gap is 1.3 cm When it's 30ºC, the gap is 0.9 cm
  • So we don't know how large to make the gaps. We do know however that the gap would be 1.3 cm when it's 22ºC, and 0.9 when it's 30ºC.
  • Calculator
  • Let me do something real quick...
  • Later
  • 30 25 20 15 10 5
  • .9  1.1  1.3  1.5  1.7  1.9
  • Temp
  • Slope = -0.05
  • Width of gap
  • y=-0.05x+2.4
  • Ok, so using the only information that Tom didn't lose, I figured out that the gaps should be about 2.4cm wide.
  • Hmm... I could answer that...
  • So according to my hand, the bridge will be done soon.
  • How soon?
  • The End?
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