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.
Dates for the medieval period are usually given as 476 to 1453 AD, or something like that. The middle ages began with the decline of the West Roman Empire, which took a long â¦ time, and so really has no fixed date.Similarly, they ended with a long series of events that are more emblematic than anything else.nd the middle ages are the time in which the first seventy universities were founded. Nor were the middle ages a time without science. The list of medieval inventions is long and impressive. They include such things as the invention of the chimney, soap, and ultimately, the printing press.