A 125 gram glass mug at 20 oC is filled with 200.0 grams of coffee at 90 oC. The final temperature of the coffee and mug reaches 83oC. Assuming that all heat lost by the coffee is transferred to the mug, what is the specific heat value for the coffee?

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.