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.
Historians generally have the Middle Ages start in 476 AD with what is called the fall of Rome. This is a date of convenience, especially since Rome did not fall in 476. What â¦ happened that year was the abdication of the last emperor of the Western Roman Empire, a six year old boy named Romulus.he medieval times also known as the middle ages started in 476 as a result of the fall of the western Roman Empire. 410 AD with the fall of the Roman empire. 476 AD might be the best date to use.