which would show an example of how physical changes are reversible?\no cutting a gold bar in two pieces and…

which would show an example of how physical changes are reversible?\no cutting a gold bar in two pieces and then putting the pieces next to each other\no burning a match and then relighting it\no melting tin and then cooling it into a mold\no combining sodium and chlorine to make the new material of table salt

which would show an example of how physical changes are reversible?\no cutting a gold bar in two pieces and then putting the pieces next to each other\no burning a match and then relighting it\no melting tin and then cooling it into a mold\no combining sodium and chlorine to make the new material of table salt

Answer

Brief Explanations:

A physical change is a change in which no new substances are formed. Melting tin is a physical change as it changes from solid to liquid state and cooling it back into a mold just changes its state back to solid without forming new substances. Cutting a gold - bar and putting pieces together doesn't truly reverse the cut. Burning a match is a chemical change. Combining sodium and chlorine is a chemical reaction forming a new substance (table salt).

Answer:

melting tin and then cooling it into a mold