There is a whine from my alternator, its fine when cold but after the car warms up its constant, i believe its the alternator bearing, i didn't have this until a weak ago, is this a sign my alternator is failing? can i do anything about it?

 

Your belts might be too tight. The whine will go away when you replace the alternator. Its better to replace it now than wait until it fails and leaves you stranded.