at what level of ozone measured in dobson units would the ozone layer in the antarctic be considered to be recovered?

Arollercoaster car at the top of a hill has potential energy kinetic energy chemical energy light energy

3.09 lab: reaction of metals 1 which combinations of substances resulted in a chemical change? for each metal that participated in a chemical change, write the type of metal it is, based on your examination of the periodic table. were there any metallic compounds that did not react with either the acid or the base? write the type of metal, based on your examination of the periodic table. make a general statement about the reactivity of the metals in this experiment.

What is the scientific name for weight?