In nonrelativistic classical mechanics, a closed system is a physical system that doesn't exchange any matter with its surroundings, and isn't subject to any force whose source is external to the system. A closed system in classical mechanics would be considered an isolated system in thermodynamics.
I believe the answer is: Because they show the truth of life
Reading books would force the people to confront the ugly side of humanities and the dark sides of life. For example, by reading history, people would be forced to realize that the good condition that society see today is build on the suffering, murder, and exploitation of another people.
Answer:
Being a slave was very painful for Frederick, even when he was separated from his mother and grandmother who were very important to him. During slavery, he got inspiration to write about his whole journey through slavery and about his whole life.
Explanation:
