You just saw a magazine ad that shows several people having fun at a football game. they are all wearing a specific shoe brand. the words on the ad say "you can run with the fast crowd." what technique has the advertising company used to persuade you to own their shoe

At 20∘c, the hole in an aluminum ring is 2.800 cm in diameter. you need to slip this ring over a steel shaft that has a room-temperature diameter of 2.804 cm . 1. to what common temperature should the ring and the shaft be heated so that the ring will just fit onto the shaft? coefficients of linear thermal expansion of steel and aluminum are 12×10−6 k−1 and23×10−6 k−1 respectively.