Name Date Period Thermal Expansion of Substances 1. A brass rod is .500 m long at 200C. What is the new total length of the rod if it is heated to 500C? (hint, add the change in length to the original length to get the total length) 2. A steel beam 12.0m sits next to a concrete wall when the temperature is 200C. A gap must be left between the beam and the concrete wall for expansion purposes. If the temperature rises to 450C. how large must the gap be if the steel beam just touches the concrete wall? 3. The steel train tracks that go across the United States are over 5540 km long. If the temperature range that is experienced by the tracks varies from -30 to 50'0. what is the total expansion the engineers needed to account for when putting the transcontinental railroad together? 4. A metal rod .50 m is heated from 15C to 95C. The length of the rod increases by 0.0096 m. What is the coefcient of expansion for the rod