<span>the dominant social system in medieval Europe, in which the nobility held lands from the Crown in exchange for military service, and vassals were in turn tenants of the nobles, while the peasants (villeins or serfs) were obliged to live on their lord's land and give him homage, labor, and a share of the produce, notionally in exchange for military protection.</span>
Most of the silver came from (A)
Answer:
Pour acetone and antkiller into the river. Rent a pickup truck, recruit a few of your friends using pizza, put on some latex gloves and take trash bags out of dumpsters. Proceed to empty the bags into the river. If you want to reduce pollution, lobby the local goverment to make laws against dumping in the river.
Rene Descartes ( 1596 - 1650 ) was very important scientist. He invented the Cartesian coordinate system. He considered mathematics like the basis to all sciences. Descartes partially agreed with Copernicus` theory about the Heliocentric system. He had his theory - "theory of the vertex". because he was scared of the Catholic church, he didn`t totally agree with the Heliocentric system. He also had his "Method of doubt": Can`t be doubted = certainty = truth.
Answer: b. He proposed that through the use of reason and doubt individuals may arrive at understanding.
