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...act mechanics|mechanical contact]]); that is, the non-local interaction of objects that are separated in space. [[Coulomb's law]] and [[Newton's law of univer ...s seems visually distinguishable from action at a distance. If however the objects are constructed of [[atoms]], and the volume of those atoms is not defined ...

...ile]] each year<ref name=OttoN>[[Otto Neugebauer]] ''The Exact Sciences in Antiquity''. Princeton: Princeton University Press, 1952; 2nd edition, Brown Universi .../www.phys.lsu.edu/mog/mog9/node9.html |date=2010-07-13 }} Today, automated astronomical observations from satellites and spacecraft require relativistic correction ...

...e in the study of [[statics|stationary]] and [[dynamics (physics)|moving]] objects and [[simple machine]]s, but thinkers such as [[Aristotle]] and [[Archimede ...by which forces are emitted and absorbed. Only four main interactions are known: in order of decreasing strength, they are: [[strong force|strong]], [[elec ...

...ef> and the [[Expansion of the universe|universe has been expanding]] ever since. Today the universe has expanded into an age and size that is physically on ...=978-0-415-96930-7 |oclc=61228669}}</ref> Over the centuries, more precise astronomical observations led [[Nicolaus Copernicus]] to develop the [[heliocentrism|hel ...

...the third [[planet]] from the [[Sun]] and the only [[astronomical object]] known to [[Planetary habitability|harbor life]]. This is enabled by Earth being a ...circumference]] of about 40,000&nbsp;km. It is the [[List of Solar System objects by size|densest planet in the Solar System]]. Of the four [[Terrestrial pla ...

...rch 2013}}</ref> [[lodestone]]"). Amber, when rubbed, attracts lightweight objects, such as feathers; magnetic iron ore has the power of attracting iron.<ref ...ric fish'' [...])</ref> The shocks from animals were apparent to observers since pre-history by a variety of peoples that came into contact with them. Texts ...

...y [[sociology]] to the '[[political philosophy]]' of [[Classical antiquity|antiquity]] and the [[Renaissance]]. [T]here is beginning to take shape a concept of Since, however, such a synonym is superfluous, "matergetics" is available as a te ...

...I in the 80s"/> followed by periods of disappointment and loss of funding, known as [[AI winter]].<ref name="First AI winter" /><ref name="Second AI winter" ...sent things such as: objects, properties, categories and relations between objects;<ref name="Representing categories and relations"> ...

...edo]]'''}}{{defn|defn=A measure of the fraction of light reflected from an astronomical body or other object.}} ...ains of certain amino acids. About 500 naturally occurring amino acids are known (though only 20 appear in the [[genetic code]]) and can be classified in ma ...