The coefficient of linear expansion a for some common materials are listed in the table. Suppose Mary would like to design an emergency overheating alarm using one of these materials. In her design, at room temperature (23.0 C), a 6.01 cm long cylinder of the material will sit with one end against a wall and the other just barely touching a button. Once the heat causes the cylinder to lengthen by 0.0248 cm, the button will be activated, turning on the alarm. Material polycarbonate aluminum a (1/C) 70.2 10-6 22.2 10-6 brass 18.7 10-6 copper 16.6 x 10-6 steel 13.0 10-6 cast iron 10.4 x 10-6 titanium 8.60 10-6 glass 5.92 10-6 At what temperature will the alarm be triggered if the cylinder is made out of aluminum? temperature: At what temperature will the alarm be triggered if the cylinder is made out of cast iron? temperature: C 'C