A continuous signal can be modeled as a function of independent variables which range over a continuum of values, example an audio wave travelling in space, 3-D space waves measured at different times.
12.
Where is the particle's " reduced mass ", is its potential energy, is the Laplacian ( a differential operator ), and is the wave function ( more precisely, in this context, it is called the " position-space wave function " ).
13.
These days most top wave sailors spend very little time competing as the type of conditions required ( massive swells producing clean, well-spaced waves and strong winds blowing cross-offshore ) are very hard to guarantee months in advance ( when planning an event ).
14.
Depending on the speed of the purchase cycle in the category, tracking can be done continuously ( a few interviews every week ) or it can be pulsed, with interviews conducted in widely spaced waves ( ex . every three or six months ).
