copper articles
What is the primary component of US pennies minted after 1982?
What percentage of copper do pennies manufactured before 1982 contain?
What typically clogs the vascular system of a flower stem, causing it to wilt?
What is the theoretical function of copper leaching into vase water for flower preservation?
Besides a biocide, what two other elements do commercial flower food packets typically provide?
Approximately what fraction of a post-1982 penny is composed of copper?
What key component do pennies fail to provide that commercial flower food offers?
If attempting the copper coin trick, which coin is scientifically the better candidate?
What common item containing salicylic acid is sometimes suggested to sanitize vase water?
What routine maintenance step is still essential even if a coin is placed in the vase water?