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.
Bows and Arrows. Eastern Woodland bows were longer than those used by Indians in other parts of the country, generally 60 to 67 inches. Depending on the wood used, these bows were easy to make, didn't break easily and worked well for a man on foot. Bows and arrows were used to hunt large game and were used in battle.