As the cart moves to the positions along the track, it has varying levels of kinetic and potential energy. However, throughout the entire ride, the SUM TOTAL of potential energy PLUS kinetic energy is always equal. Explain why this is true.

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.