A point mass is placed inside a thin spherical shell of radius R and Mass M at a distance R/2 from the Centre of the shell. The gravitational force exerted by the shell on the point mass is​

Cin carbonh in hydrogeno in oxygen

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.