Linear Expansion Coefficient Lab Physics 103A Mohammad Ihsan, Julian Victoria, Patrick Rojek, Nirav Patel Professor Huang 2/13/17
Objective The objective of this lab was to measure the coefficient of linear expansion for different metal rods. Introduction When the temperature of a certain substance is increased in a range that does not produce a change of phase, the linear dimension for that substance increases as well. The added heat increases the vibrational kinetic energy of the atoms in the material, which in turn increases the distance between the atoms. An equation is thus derived, where the increase in a linear dimension ∆ L (L-L 0 ) is proportional to the increase in temperature ∆T (T-T 0 ) and initial dimension L 0 . The equation is: ∆ L L 0 = α ∆T , where the proportionality α is called the coefficient of linear expansion. This coefficient depends on many factors, such as, but not limited to, the composition and purity of the material, and temperature. This was the main equation that we needed for this experiment.
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