Apenny dropped into a wishing well reaches the bottom in 1.5 seconds. what was the velocity at impact?

At the surface of the Earth, the acceleration of all objects due to gravity
is about 9.8 m/s². 

So an object that's acted on by no other forces except gravity increases
its speed by 9.8 m/s every second. 

If the object is dropped from "rest" (zero speed), then after 1.5 seconds
have passed, it's falling at (1.5 x 9.8) = 14.7 m/s .

Its velocity is 14.7 m/s in the direction of straight down.

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.