I don't understand, what is the question you're supposed to answer?
Answer: no friction, metal
Explanation: yes
Radioactive decay occurs when an atom has either to many or to few neutrons and becomes unstable and start to emit radio active radioactive radiation and the atom start to decompose.
At the end two things can happen either the atom will transform in a new element with a lower atomic # and atomic mass # or the remaining neutron will transform into an electron and be on its own way
The virus becoms infection, and they create an epidemic that will last for a long time. This was the case back in the early days.
concise verbal or mathematical statement of a relation that expresses a fundamental principle of science, like Newton's law of universal gravitation.
