# Experiment_7 - Page 1 LAB REPORT EXPERIMENT#7 COEFFICIENT...

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α Al= α Cu= α Steel= Page 1 LAB REPORT EXPERIMENT #7 COEFFICIENT OF LINEAR EXPANSION DATE PERFORMED: MAY 16, 2007 EDRIC VIERRA LAB PARTNER: CHRISTOPHER FLORES

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Page 2 Procedure: In this lab experiment we will be determining the coefficients of linear thermal expansion for several metals. We will also be reviewing error analysis and the importance of relative error. Most substances expand with an increase in temperature and contract with a decrease in temperature. In this experiment the coefficients of expansion for several metal rods will be determined by heating them, and measuring, by means of a micrometer screw, the corresponding change in length, ΔL. Data: Calculations ΔL = αLΔT
Page 3 Formulas ΔL = αLoΔT α= ΔL/LoΔT Questions: 1) Length, ΔL, must be measured carefully, while the length of the rod L can be measured relatively crudely with a meter stick because ΔL itself is a very small quantity. 2) Consider a compound bar consisting of aluminum and iron strips fastened together. If this is heated, 3)

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