A10 kg falling object accelerates downward at 9.8 meters per second per second. what is the force acting on the object? a. 9.8 n b. 10 n c. 98 n d. 100 n

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.

The answer is a i think

  concave means having an outline or surface that curves inward like the interior of a circle or sphere. so the mirror curves inward.