does anyone have a link for this data... or can ppl put what they know here... much help if you did.... eg 1 gal= ??? cups.. etc

Google: "units coversion"
http://www.onlineconversion.com/

You really should try using the internet a lot more for DAT prep. It's an awesome resource. I don't mean just you, but everyone when they're studying for the DAT. Any word you don't know can be easily found on online dictionaries or by using search engines. A lot of times it is faster than looking it up in a text book.