In "death, be not proud." the speaker is addressing his words to "death" himself, whom the author is trying to convey as a jealous and generally bad person.
The fifth section of the fourteenth amendment of the Constitution of the United States of America gives Congress the power to prevent that amendment from being violated, since it establishes that Congress will have the power to enforce through appropriate legislation what is declared.
It expands due to the fact the mercury reacts to heat in such a way that makes it rise up the tube.
