What is the Young's Modulus of Copper?

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SUMMARY

The Young's Modulus of copper is approximately 100 GPa, as confirmed by various sources including Wikipedia. The user attempted to calculate Young's Modulus for different gauges of copper wire (30SWG, 38SWG, and 24SWG) and reported values of 26 GPa, 3.1 GPa, and 49 GPa, respectively. The calculations were based on the formula E = kL/A, where E is Young's Modulus, k is the gradient from a force-extension graph, L is the original length, and A is the cross-sectional area. The user acknowledged that their results were affected by subpar measurement equipment.

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  • Knowledge of wire gauges, specifically Standard Wire Gauge (SWG)
  • Ability to calculate cross-sectional area from diameter measurements
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groom03
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Homework Statement


I'm supposed to calculate the youngs modulus of a 2 meter length of copper wire.


Homework Equations


None


The Attempt at a Solution


for 30SWG i get 26GPa
for 38 i get 3.1 GPa
and for 24 i get 49 GPa

Youngs modulus of copper is meant to be ~100GPa (from wiki)

Have i forgotten to do something or are my results way off?
 
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You aren't 'calculating young's modulus'. You looked that up. You are calculating something else. What is it? What formula are you using to obtain it? The units of what you are after probably aren't GPa.
 
I made a force extension graph and the gradient is k i use that in the formula E=kL/A
where L is the original length and A is the cross sectional area of the wire.
 
Ok, so k=EA/L. The units of E are N/m^2, A is m^2 and L is m. So the units of k are N/m. If that's the units for your answers they don't look right. Pick 24SWG for example. What's the wire diameter? What do you get for the area?
 
Sorry sorry sorry sorry sorry to waste peoples time, me and my teacher had a look at it today and ,my answer is right but there is a huge error because of the rubbishy equipment i was stuck using
 

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