The material that a rubber ball is made of is different from the material that makes up something like a pool table ball because it allows the ball to bounce. What type of energy is in this material?

The patient had a wire localization performed by radiology and was taken to the operating room. under local anesthesia of the left breast was prepped and draped in a sterile manner. a breast line incision was made through the entry point of the wire, and a core of tissue surrounding the wire approximately 1x2cm was removed