Thermal Expansion Experiment

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this is lab report about physics. it includes objectives physical principles discussion conclusion and questions.

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School: Boston College

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Solid materials always increase in size when subjected to temperature. The effect of
temperature on solid materials applies to materials with structural makeup that undergo heating
and cooling. Unless a solid material experiences such application, structural damage culminates.
Thermal expansion is attributed to the coefficient expansion of a material based on the amount of
temperature. The core objective of this experiment is to investigate the thermal expansion of
metals with regards to temperature coefficients and liner expansion. The experiment will
examine material characteristics that represent changes in the size of materials. This experiment
will be significant in measuring the level of metal expansion to give them the specific value of
the application.
Physical Principle
In solids, the increase in temperature results to thermal expansion of a material as a
whole. The process of expansion is attributed to the change in the average distance of atom or
molecules of a substance caused by the temperature. Atoms are strongly held together by
different binding forces which make a material solid. In this context, atoms tend to vibrate back
and forth when they are subjected to a more internal energy increase in energy. When atoms are
subjected to an increased temperature, they become active and begin to vibrate over long
distances making the entire material to expand. The mode of expansion might be in a different
direction, however, if the mode of expansion is similar in all direction, it is known as isotopic
expansion. Linear expansion describes the change of size and dimension of solid material in
thickness, length, and width. Linear expansion is estimated to be proportional to ΔT. ΔT= T-TO.
The fractional change representing the change in temperature is denoted by;

ΔL= αLO ΔT where ΔL= L-LO and ΔT=T-TO while α is the thermal coefficient of linear
List of Experimental Equipment
➢ T...

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