<span>by collecting “proxy data” from tree rings, ice cores, and historical records</span>
Answer:
Please Provide more information, but generally you can use any measuring tools. If its volume, the formula is V = W * H * L
Explanation:
They are filled with neon paint like the ones in the blue man group shown below hope this helps
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