A silver bar 0.125 meter long is subjected to a temperature change from 200°C to 100°C. What will be the length of the bar after the temperature change?
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Lc = Change in length (m)
Lo = Original length (m)
α = Linear Temperature Expansion Coefficient (10-6 m/K)
Tc = Change in temperature (K)
The coefficient of linear expansion (Kl ) for silver is 0.0000189.
The linear temperature expansion coefficient of Silver = 18.9×10-6 m/K
Thus,
Lc = α ×Tc× Lo
Lc = 18.9×10-6× -100×0.125
Lc = -0.00023625
Change in length of bar = -0.00023625 m
New Length of bar = 0.125 - 0.00023625
Thus, the new Length of bar = 0.12476375 m
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