Answer:
Metal is a good conductor of heat but air is a poor conductor of heat.
Explanation:
Touching the metal sides of the oven can be harmful while holding our hand briefly in the oven air is okay. This tells us about the relative conductivities of metal and air <em>that metal is a good conductor of heat but air is a poor conductor of heat</em>. Conduction is the transference of heat through physical contact. Not all materials conduct heat in the same way. The best conductors of heat are metals and stone.
The Iron Curtain was a problem because it blockaded access to East Berlin and prevented the free flow of Germans across the borders between East and West Germany. More broadly it prevented the movement of ideas and peoples across this artificially created boundary. And more importantly than that it signified the dividing line of the Cold War between Western Europe and the United States and the Soviet Union which had a major impact on fomenting mistrust and conflict.
The citizens of Rome put the good of the republic ahead of their own desires and the Founding Fathers hoped American people would do the same. Severing in public office without financial gain was important in the success of the country.
