Answer:
Well based on the fact that the very first patented rock crushing machine was made in the year 1830, and the first successful, Eli Whitney Blake's, was in 1858, I'd say the development process was around 30 years.
Answer: A “common school” was a public, often one-roomed school in the United States or Canada in the 1800s. The term was coined by Horace Mann and refers to the school's aim to serve individuals of all social classes and religions. Students often went to the common school from ages six to fourteen (predecessor of grades 1-8).
Explanation:
Answer:
Explanation:
Microevolution is the change in allele frequencies that occurs over time within a population. This change is due to four different processes: mutation, selection (natural and artificial), gene flow and genetic drift.
Thomas Hobbes postulates that men are driven by “a perpetual and restless desire of power after power, that ceaseth only in death.” The miserable consequences of this drive for power and the competing “desire of ease and sensual delight” and “fear of death and wounds” lead them to establish and obey.
