Determine el cambio en la energía interna en el proceso de fusión de un cubo de hielo de 12 g y cuya temperatura inicial es 0˚C

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.first and third quarters 

Answer(b) both involve the use of levers;

What kind of enegia produces the mixture of bicarbonate and vinegar  chemical producetion