If you do 1,200 J of work and a lever does 900 J of work, what is the efficiency of the lever?

During the early neolithic era, people relied on domesticated animals to provide each of the following except a. hides for clothes b. labor to pull plows c. manure for the soil d. meat, cheese, and milk for food

Which of the following statements would be supported by both a communist and a utopian socialist? a) a government should restrict the number of imports and exports to protect its gold reserves b) governments have no right to restrict the actions of businesses or customers c) society will shift towards socialist ideals without the need for violent revolutions d) the gains of the industrial revolution should be shared by all members of society

President reagan believed the spread of communism in latin america was directly due to? a.guerrilla fighters. b.contras. c.terrorists. d.leftists.