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Physics 103A-003Lab DLinear Expansion CoefficientNames: Fatimah Akhtar, Aisha Alam, Megha Bansal, Ali Chahine, Rashmi Ketha, Brijen PatelExpediter: Aisha Alam
Objective:To measure the coefficient of linear expansion for different metal rods.Theory:Linear dimensions for most substances increase as the temperatureincreases in a range that does not produce a change of phase. The addedheat increases the vibrational kinetic energy of the atoms in the material,which in turn increases the distance between the atoms. To a firstapproximation, the increase in a linear dimension ∆L is proportional to theincrease in temperature and the initial linear dimension:(∆L / LO) = α * ∆TWhere the proportionality α is called the coefficient of linear expansion. This coefficient dependson many factors. Such as the composition and the purity of the material, temperature, etc.Data:RodMaterialInitialTemperatureTi(°C)FinalTemperatureTf(°C)TemperatureChange∆T = Tf- Ti(°C)InitialReadingXi(mm)Final