5 (13.31). A tire is filled with air at 15C to a gauge pressure of 230 kPa. If the tire reaches a temperature of 38C, what fraction of the original air must be removed if the original pressure of 230 kPa is to be maintained? 6 (14.42). A 100-W lightbulb generates 95 W of heat, which is dissipated through a glass bulb that has a radius of 3.0 cm and is 0.50 mm thick. What is the difference in temperature between the inner and outer surfaces of the glass?