two cyclists are cycling in opposite directions along the side line of a rectangular field. it is observed that they covered the same distance over a time interval of 3s .which one quantities is regarding the cyclists over the interval of 3s?​

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.