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.
Both of these pipes have many differences that make both of them, exceptional and one of their own kind. PB is basically made of a plastic resin material that was used for plumbing pipes because of its features, like flexibility, cost effectiveness, freeze resistance etc. Unfortunately, people have not accepted these pipes due to its weak features that cause them loss.