John F. Kennedy was the US president during the Cuban Missile crisis General Secretary of the USSR was Nikita Krushchev and Fidel Castro was the Cuban ruler involved in this â¦ crisis.
What is the metal used for most electrical wiring and water pipes? Copper is the most common metal used in electrical wires because it has a structure which includes freely-moving negatively-charged particles-called electrons-which are es â¦ sential for the conduction of electricity.
Many pipe metals, including copper and galvanized steel, are still used in homes today. Although long lasting, metal plumbing requires laborious installation work. Pipes need to be threaded or welded, and tubing often requires the installation of sensitive compression fittings. The introduction of the plastic plumbing system pipe in the 1930s, and its increase in popularity in the 1950s and 1960s, made the plumberâs job a lot easier. These pipes give plumbers an option thatâs both easier to install and that prevents some of the plumbing problems common with metal pipes.