Van der pol's equation has been used to describe many oscillatory processes. it is - (1 - x)] + = 0 plot y(t) for u = 1 and 0 st s 20, using the initial conditions yo) = 5, y(o) = 0.

answer and explanation;

composition refers to both the types of minerals within a rock and the overall chemical makeup of the rock while texture refers to the size and arrangement of the minerals or grains that make up a rock. both composition and texture can be used to classify rocks, such as igneous rocks. texture describes how the rock became solid or crystallized from liquid, melted rock. composition of a rock describes the minerals that make up a particular rock.