So, in the EK physics book, they've got about 1 page that mentions Young's modulus, shear modulus, and the bulk modulus. This is something I don't remember at all from my physics class, and they don't really explain it too well. They ask practice questions on it. I'm just wondering how important this actually is for the MCAT? I'd also appreciate any clarifications on the differences between them, and if the formulas are also important to memorize. Thanks.