What was improved when the Han dynasty astronomers measured how the stars moved

According to thomas hobbes concept of the social contract, what do people exchange for the protection by the government?

The belief that war often drives civil modifications to a society is based upon the evidence that in times of external conflict, a society is forced to abandon long held discriminatory values to:

In which way does the due process clause best represent the spirit and goals of the us bill of rights? a) it protects states' rights against the federal government. b) it protects citizens' rights against government mistreatment. c) it establishes the social and political equality of us citizens. eliminate d) it outlines social and political responsibilities of us citizens.