Two boats are anchored in the harbor separated by a horizontal distance of 18 m. The boat bobs up and down as waves enter the harbor. When one boat is at its highest point, the others is at its lowest point and there is one wave crest between them. Each boat makes exactly 2 complete cycles every 16 seconds. The vertical distance between a boats highest and lowest point is 3.6 m

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.