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Data Calculations Tube L (mm) R mm (0) AL (mm) Rhot ( T rm (C) Thot C AT (C) Aluminu 752 11172 1.42 743 m Brass 751 10800 1.08 741 Copper 752 11100 0.99 742 Questions 1. Look up the accepted values for the Inear expansion coefficient for aluminum, brass, and copper. Compare these values with your experimental values. What is the percentage difference in each case? Is your experimental error consistently high or low? 2. On the basis of your answers in question 1, speculate on the possible sources of error in your oxporimont. How might you improve the accuracy of the experiment? 3. From your result, can you calculate the coefficients of volume expansion for aluminum, brass, and copper? (Le. AV= a VAT) 1. Use the Conversion Table at the and of this manual, or the one attached to the frame tube of the apparatus, to convert your thermistor resistance measurements, R_ and R.Into temperature measurements, T and Too Record your results in the tobin. 2. Calculate AT = They . T. Record the result in the table. 1. Using the equation AL - LAT , calculate a for aluminum, brass, and copper. Aluminum Copper =