The internal energy and temperature of a system decrease (E E. The System and Work. The system is usually defined as the chemical reaction and the boundary is the container in which the reaction is run. In the course of the reaction, heat is either given off or absorbed by the system.
The Middle Ages began in the year 476 A.D. and ended around 1300 with the beginning of the Renaissance. The Middle Ages, also called the Medieval Period, began just after the fall of Rome and it dominated the European continent through the early 14th century. The Middle Ages filled a time period between the ending of a great reign and the beginning of a new era characterized by revitalization and cultural growth.
home timelines the middle ages timeline the middle ages timeline timeline description the middle ages was the time after the fall of the roman empire up to the time of the renaissance also known as the dark ages it was originally thought that this period of instability had no contributions to the world however without the middle ages we would have no gothic design no stained glass windows in churches no illuminated manuscripts and no sense of chivalry