Which object has particles with the most kinetic energy? A. A crushed aluminum can at room temperature
B. An empty aluminum can sitting in a burning campfire
O C. An open aluminum can left overnight in a freezer
O D. A sealed aluminum can stored in a cooler full of ice

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.