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.
Many beginner programs use a 62 15-18 lb draw recurve bow, which is suitable for either youth or beginner adults, if the program is mixed. Distance to target is not usually more than 9 meters. College archery programs /adult archery programs use different equipment- 66 68 bows, weight depends on goals. Bow.