Alpha is often used in physics and chemistry as a symbol or in the names of things, for example alpha particles (which are two protons and two neutrons bound together into a particle the same as a helium nucleus). The symbol is also used a lot in mathematics in algebra, for example naming angles.
Recurve bow. A recurve bow is a bow with limbs that curve away from the archer when unstrung. A recurve bow stores more energy and delivers energy more efficiently than the equivalent straight-limbed bow, giving a greater amount of energy and speed to the arrow.
Recurve Bow Set Up Version 3 September 2007 Page 5. Copyright Archery Australia September 2007. You can also check this by placing a straight edge (arrow shaft, ensure itâs a parallel arrow shaft and. not a barrelled shaft) along the side of the bow window and the string.