Search results
Results from the WOW.Com Content Network
The electric field was formally defined as the force exerted per unit charge, but the concept of potential allows for a more useful and equivalent definition: the electric field is the local gradient of the electric potential. Usually expressed in volts per metre, the vector direction of the field is the line of greatest slope of potential, and ...
Also amphidrome and tidal node. A geographical location where there is little or no tide, i.e. where the tidal amplitude is zero or nearly zero because the height of sea level does not change appreciably over time (meaning there is no high tide or low tide), and around which a tidal crest circulates once per tidal period (approximately every 12 hours). Tidal amplitude increases, though not ...
Today the vast majority of publications no longer refer to electricity as meaning electric charge. Instead they speak of electricity as electromagnetic energy. The definition has drifted even further, and many authors now use the word electricity to mean electric current , energy flow , electrical potential , or electric force. Others refer to ...
An energy transition is a broad shift in technologies and behaviours that are needed to replace one source of energy with another. [14]: 202–203 A prime example is the change from a pre-industrial system relying on traditional biomass, wind, water and muscle power to an industrial system characterized by pervasive mechanization, steam power and the use of coal.
But a new study suggests that something similar could be done with gravitational principles as well. This could help scientists better test the universality of quantum effects. The history of ...
The term "technical geography" is a combination of the words "technical", from the Greek τεχνικός (tekhnikós, translated as artistic, skillful, workmanlike), meaning relating to a particular subject or activity and involving practical skills, and "geography", from the Greek γεωγραφία (geographia, a combination of Greek words ...
The word was first used in relation to the study of online communities in the 1990s by Kenneth Dowling, the Librarian of the City and County of San Francisco. [3] Immediate precursor terms in the industry press were: "the geospatial Web" and "the geoaware Web" (both 2005); "Where 2.0" (2005); "a dissident cartographic aesthetic" and "mapping ...
An electrical network consisting of a closed loop, giving a return path for the current. electric current A flow of electric charge through a conductive medium. electric displacement field electric field The region of space surrounding electrically charged particles and time-varying magnetic fields. The electric field represents the force ...