We say that non-metals r not malleable even though we have sheets of plastics as shade, non ductile even though we hv rubber coating on copper wires and we say they r not sonorous even thogh some drums r not made of metals. WWWHHHYYY??????/
Answers
Answered by
0
First off, malleability is when you BEAT a substance flat. In case of plastic, it has been MOULDED that way.
Same for ductility. Something is ductile when it is DRAWN into a longer form and it stays that way. Elastic bands are, well, elastic. That is they come back to their original position after being released. And as far as rubber on copper wires goes, it also has been moulded in some way.
Perhaps i should have mentioned this at the beginning: Malleability and Ductility are properties of ELEMENTS (more precisely, elements that exist as metals. For example: Gold, Copper, etc). Therefore you cant compare the objects you have mentioned with elemental metals.
Same goes for 'drums that are not metal'. Drums are never metal. Only the supporting part is metal which plays no role in making a sound whatsoever. The part which is beat is either some animal skin, or again, moulded plastic. So that answers the last part.
Same for ductility. Something is ductile when it is DRAWN into a longer form and it stays that way. Elastic bands are, well, elastic. That is they come back to their original position after being released. And as far as rubber on copper wires goes, it also has been moulded in some way.
Perhaps i should have mentioned this at the beginning: Malleability and Ductility are properties of ELEMENTS (more precisely, elements that exist as metals. For example: Gold, Copper, etc). Therefore you cant compare the objects you have mentioned with elemental metals.
Same goes for 'drums that are not metal'. Drums are never metal. Only the supporting part is metal which plays no role in making a sound whatsoever. The part which is beat is either some animal skin, or again, moulded plastic. So that answers the last part.
Similar questions