Well. I want to know about the quarks, mesons, etc? do any of you know the speed of quarks??

The speed of quarks?

 

Are you talking about the kinetic energy needed to overcome the strong nuclear force?

i don't know i heard that quarks move faster than light. I want to confirm it?

they don't. photons have no mass or volume and thus they have nothing resisting their motion. they are the fastest "things" that exist. quarks have mass and volume and thus cannot exceed the speed of light.

"they are the fastest "things" that exist"

 

What about the tachyon (or other faster-than-light) theories? Even though, photons are the fastest things proved to exist.

well, i haven't studied terribly much physics yet (just starting my ap class this year in fact). i'd have to look into those

Tachyons have negative mass, so theoretically (that's the key word) they would be restricted to entirely OVER the speed of light. Nobody can prove if they can exist yet.

cap'n said it all, theory means it's not possible yet [or ever], no one knows if they exist, its all questions with no answers.

 

quarks can't travel faster than light.

 

as far as we are concerned nothing can travel faster than light, except the 'effectively made up' tachyons...