Apiston in a heat engine does 600 joules of work and 1,700 joules of heat are added to the system. determine the change in internal energy and explain how this example demonstrates the conservation of energy.

The change in internal energy is calculated by obtaining the difference between the heat and the work. That is,
                       change in internal energy = 1,700 J - 600 J
                                                                       = 1,100 J
This is an example of conservation of energy because the energy that is not used for the worked performed is converted to internal energy. 

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.