Lab D Linear Expansion Coeffecient.docx - Physics 103A-001 Professor Alexander Clark Lab performed on 2 October 2017 Lab D Linear Expansion Coefficient

Lab D Linear Expansion Coeffecient.docx - Physics 103A-001...

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Physics 103A-001 Professor Alexander Clark Lab performed on 2 October 2017 Lab D: Linear Expansion Coefficient Introduction The objective of this lab was to measure the coefficient of linear expansion for different metal rods. The linear dimensions of most substances increase as the temperature increases in a range that does not produce a change of phase for the substance. The added heat of these substances causes an increase in the vibrational kinetic energy of the atoms in the material. That added heat causes the distance between the atoms to increase. The increase in a linear dimension ∆ L is proportional to the increase in temperature ∆T and the initial linear dimension L O : ∆ L L O = α ΔT where α is the coefficient of linear expansion. This coefficient depends on a lot of factors such as the composition and purity of the material, temperature, etc. Experimental Procedure The equipment we used for this lab was a linear expansion apparatus attached with a dial gauge, two metal rods (Copper and Aluminum), a hot plate, steam generator, thermometer, and a meter stick.
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