observables mp21k In physics, particularly in quantum_physics a system observable is a property of the system state that can be determined by some sequence of physical operations. These operations might involve submitting the system to various electromagnetic fields and eventually reading a value off some gauge. In systems governed by classical_mechanics any experimentally observable value can be shown to be given by a real-valued function on the set of all possible system states. In quantum physics, on the other hand, the relation between system state and the value of an observable is more subtle, requiring some basic linear_algebra to explain. In the mathematical formulation of quantum_mechanics, states are given by non-zero vectors in a Hilbert_space. 041009 ... 1) *** * Human_Spaces *** Death__'toll', Injury_'Toll' & Crime_rate 041010 ... . e.g. Death_'toll' around_and_across a_wrong_war_in_21k:- More_than_11317_Iraqi_civilians_have_been_killed more_than_1000_'Full_sized_commemorative_coffins' 041010 ... 2) Oil_prices, Gas_prices and Water_prices 041010 ... . e.g. * 108 * NEW YORK- Oil prices hit another record on Friday, 8 Oct 2004 trading as high as $53.40 a barrel NYMEX LIGHT SWEET CRUDE OIL PRICE http://www.oilnergy.com/hpix/1onymexy.gif 041010 ... kx21 M_physics_21 / MP21k Postition, momentum, Energy, Mass, Temperature, wavelength, etc. 041018 ... . "Position" 041018 ... 3) *** * Human_spaces *** "Spin" of Man_'Talk', "scent" of Woman_'Nag', etc. 041018 ... eK http://background.uchicago.edu/~whu/araa/node5.html 050424 ... 4) * M_physics_21 : Cosmic Temperature * 050424 ... . http://background.uchicago.edu/~whu/araa/node2.html 050424 what's it to you? who go blather from