0 Members and 1 Guest are viewing this topic.
When the molecules are warm they are vibrating - wriggling. If you imagine a straight piece of rope and then wiggling it, it will get shorterSo normally the rubber molecules are all wiggley.
You can test this out: Take a good thick rubber band and hold it between your hands and stretch it out. Then immediately put it up to your lips- notice the temperature. Then let it relax and feel it again- notice the change in temperature. It is a fairly dramatic change.Colleen