Which part of the cells stores food ,water, and other materials

What property is a characteristic of a substance that can be observed and does not change the identity of the substance

Awoman holds a book by placing it between her hands such that she presses at right angles to the front and back covers. the book has a mass of m = 1.8 kg and the coefficient of static friction between her hand and the book is μs = 0.67. no attempt 50% part (a) what is the weight of the book, fgb in newtons?

Arrange the images in order to show how lake-effect snow occurs.