Which would show an example of how physical changes are reversible? Cutting a gold bar in two peices and then putting the pieces next to eachother. Or burning a match and then relighting it. Or melting tin and then cooling it into a mold. Or combining sodium and chlorine to make the new material of table salt

Question

Francesca Hatfield

Physics

19 November, 09:35

Which would show an example of how physical changes are reversible? Cutting a gold bar in two peices and then putting the pieces next to eachother. Or burning a match and then relighting it. Or melting tin and then cooling it into a mold. Or combining sodium and chlorine to make the new material of table salt

+5

Answers (2)

Know the Answer?

Landyn Liu · Answer 1

Melting tin, then cooling it into a mold.

You're only melting a solid into a liquid, then back into a solid. You're not making a completely new substance.

Rebel · Answer 2

Cutting a gold bar as well as melting tin but if I had to choose one I'd choose the gold bar