Identify the forces acting on the cars and explain why the cars do not slide down the hill

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.

Ryan is examining the energy of the particles in a bar of gold. what is ryan most likely studying?

Calculate the volume of this regular solid. what is the volume of the cone? round your answer to the nearest hundredth