What does it mean to say that scientific models are open to change?

A. Scientific models are usually not very accurate.
B. Scientific models can be adjusted when new information is found.
C. People can adjust scientific models to fit their personal beliefs.
D. Experimental results can be changed to fit the accepted model.

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.