We also discussed the intriguing proposition where noise can extinguish flame. This exists - fire can be extinguished by pointing noise at it. Unfortunately, this application cannot be directed at fire over a wide area, however we all know things change in the future. We can hope it might have some impact in Australia.
We then watched an extremely interesting video on the Noble metals - Rhodium Iridium Platinum and Gold. These are all extremely rare metals. Our lecturer had several bars as examples and explained that in his hands were several million dollars worth. These metals are used as catalysts in all sorts of applications. It was extremely interesting seeing these metals and having their uses explained.
There are Noble Metals and Noble Gases. This simply means that they do not react easily with oxygen.
Neville Gibb