Although robots have largely taken the place of humans for travel to the moon and beyond, humans will likely return to the moon someday. where should we land? calculate how hot it gets when the sun is directly overhead. (the moon reflects 12% of incoming light back into space.)

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.