Results:Percent Difference =| Experimental - Accepted Value | / (Accepted Value) * 100%experimental valueaccepted valuepercent differencesteel0.0000105430.00001318.9%copper0.0000191260.00001712.5%aluminum0.0000213570.00002411.0%Discussion:The values for the coefficients of linear expansion for steel, copper, and aluminum found experimentally are close to, but do not agree with the accepted values. The percent differences from the accepted values of the coefficients of linear expansion are outlined in the table above. Steel has the largest percent difference while aluminum has the smallest percent difference. Some possible sources of this discrepancy in the experimental values versus the accepted values could likely be caused by human error. For example, using the meter stick to measure lengths to the nearest mm was difficult. The gauge was also difficult to use and the materials inside the device could have absorbed some of the heat.In conclusion, the increase in a linear ∆L is proportional to the increase in temperature and the initial linear dimension.