#13 or #14, ! ! will mark brainliest if applicable

The of a machine determines its "usefulness." a. input force b. output force c. mechanical advantage

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.

Which form of cell division creates the sperm and egg, resulting in half of the chromosomes as the other cells?