thermal expansion
Experiment 1: Thermal Linear Expansion
Abstract: The thermal linear expansion of copper and aluminum is the focus of this experiment where the two metals have a tendency to expand their length in response to the change of temperature. Each metals have their own coefficient of linear expansion which describes how the size of an object changes with a change in temperature while the pressure is held constant. We 're able to determine the theoretical coefficient of linear expansion of the two metals by substituting the values we acquired in measuring the length Lo of the rod at to (before we heated the sample metal) and the length ΔL at tf after we heated the metal. We used the digital multi tester that shows the resistance of the thermistor with correspond temperature on the table below. We had seen how the both copper and aluminum expanded their dimensions when heat is applied to their bodies. Because Aluminum have a greater coefficient of linear expansion than the copper, so we expected that the Aluminum metal would be longer than the Copper metal which equal to 23.80x10-6 and 16.80x10-6 respectively. we compared the actual and theoretical coefficient of linear expansion of the copper and aluminum to determine the percentage error of the copper and the aluminum which are 19.08% and 24.37% respectively. We can 't acquire values that have a percentage error lower than 5% because of the factors affecting it like the air temperature. We think that the air temperature which is cold due to the air-condition affected the resistance of the thermistor and because of its constant loss of heat, we can 't decide which value of the resistance of the thermistor we should consider. Another parts thermal expansion are area expansion and volume expansion but we only focus on the linear expansion. we can apply the thermal linear expansion in the roads or bridges. They are expanding when the sunlight is directed to them and the friction cause by the tires of the vehicles or
Abstract: The thermal linear expansion of copper and aluminum is the focus of this experiment where the two metals have a tendency to expand their length in response to the change of temperature. Each metals have their own coefficient of linear expansion which describes how the size of an object changes with a change in temperature while the pressure is held constant. We 're able to determine the theoretical coefficient of linear expansion of the two metals by substituting the values we acquired in measuring the length Lo of the rod at to (before we heated the sample metal) and the length ΔL at tf after we heated the metal. We used the digital multi tester that shows the resistance of the thermistor with correspond temperature on the table below. We had seen how the both copper and aluminum expanded their dimensions when heat is applied to their bodies. Because Aluminum have a greater coefficient of linear expansion than the copper, so we expected that the Aluminum metal would be longer than the Copper metal which equal to 23.80x10-6 and 16.80x10-6 respectively. we compared the actual and theoretical coefficient of linear expansion of the copper and aluminum to determine the percentage error of the copper and the aluminum which are 19.08% and 24.37% respectively. We can 't acquire values that have a percentage error lower than 5% because of the factors affecting it like the air temperature. We think that the air temperature which is cold due to the air-condition affected the resistance of the thermistor and because of its constant loss of heat, we can 't decide which value of the resistance of the thermistor we should consider. Another parts thermal expansion are area expansion and volume expansion but we only focus on the linear expansion. we can apply the thermal linear expansion in the roads or bridges. They are expanding when the sunlight is directed to them and the friction cause by the tires of the vehicles or
References: [1] Young, H., Freedman, R., University Physics with Modern Physics, 11th Edition,2004 [2] Bernard, C.H., Laboratory Experiment in College Physics, 7th Edition, 1995