The length depends on the person. In MLB (Major League Baseball) players choose their bat size and weight, this can be anywhere between 30 and 36 inches. (all bats in MLB must be wooden)
The 2009 Demarini Vendetta is a composite bat. They were going to make all composite bats for 2011 Illegal but they didn't fallow through with the rule. This bat is legal to use in 2011 but in 2012 it may be illegal because it's a composite bat.
No, they are not.
American engineeer who is generally credited with inventing basseball
jogging running basketball soccer basseball football