All metals can conduct sound, but some conduct it a bit better than others.
Better for what?
Sound travels better through wood than water
Sound will travel better in string because speed of sound on solids is greater than that in air. As string is a solid so sound will travel faster (or better) in string than in air
Yes, solids transmit sound better than gases because their molecules are closer together.
potentially 4x better picture quality and 6x better sound. but it all depends on your tv and speakers and cables.
Better than what? - It isn't clear what you are comparing with what.
It depends. Not when they are biometrically sound.
The dsi is better because it has better sound quality. I would recommend the dsi.
No. The older the violin, the better the sound.
cause its easier for sound waves to travel through air than through liquid
Well for one, with a sound card you get to hear sound from your computer. But no really, with better or high end sound cards, you get clearer better sounding sounds from your PC. That's all there is to advantages from sound cards, You get sound...Lol.