The sum of all the potential energy and kinetic energy in an object is equal to it's Answers Choices: A. Thermal Energy B. Kinetic Energy C. Potential Energy D. Force PLEASE HELP DUE TODAY

B. kinetic energy

Explanation:

The sum of kinetic energy and potential energy of an object is its total mechanical energy.

answer is: c. the experiment shows that the red substance experienced a chemical change.

this is chemical change (chemical reaction), because two new substances are formed (metalig liquid and gas), the atoms are rearranged and the reaction is followed by an energy change.

this is example of chemical decomposition.

chemical decomposition (analysis) is the separation of a single chemical compound into its two or more elemental parts or to simpler compounds.  

chemical decomposition is opposite of chemical synthesis.