What are some examples of metals and nonmetals

What is the radius of the circular path ofa charged particle in a magnetic field?

Which of the following explains why it took so long for the public to accept the negative health effects of smoking? a)people were waiting for counter reasons, and those were presented.b)scientists had not completely finalized their results, which took 30 years.c)cigarettes were cheaply available and media channels were very inefficient.d)cigarette manufacturers were trying hard to bring an alternative into the market

Why is the energy that results from a roller coaster's position at the top of a hill referred to as potential energy?