A wine barrel has a diameter at its widest point of 134.460 cm at a temperature of 20.0 °C. A circular iron band, of diameter 134.448 cm, is to be placed around the barrel at the widest spot. The iron band is 5.00 cm wide and 0.500 cm thick.
(a) To what temperature must the band be heated to be able to fit it over the barrel?
(b) Once the band is in place and cools to 20.0 °C, what will be the tension in the band?