In quantum mechanics and particle physics, spin is an intrinsic form of angular momentum carried by elementary particles, composite particles, and atomic nuclei. Spin is one of two types of angular momentum in quantum mechanics, the other being orbital angular momentum. The orbital angular momentum operator is the quantum-mechanical counterpart to the classical angular momentum of orbital revolution: it arises when a particle executes a rotating or twisting trajectory. The existence of spin angu
The Famous Orca Fishing Boat from the Movie Jaws - A detailed model. Full Playlist: http://www.youtube.com/playlist?list=...
1 The Inuit people made two types of boats: the kayak and the umiak. 2  Kayaks were small, lightweight boats mainly used for hunting. 3  Kayaks were one-person wood frame boats covered with sealskin. 4  They were built to be lightweight, and easy to paddle and maneuver in the water. Kayaks were one-person wood frame boats covered with sealskin. 2  They were built to be lightweight, and easy to paddle and maneuver in the water. 3  Sealskin skirts were wrapped around the occupant's waist to prevent water from entering the boat. 4  Umiaks were large, open boats mainly used for travel.