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A physical body as a whole is assumed to have such quantitative properties as mass, momentum, electric charge, other conserved quantities, and possibly other quantities. An object with known composition and described in an adequate physical theory is an example of physical system.
For a mathematical function of a real variable, a measurement of the sensitivity to change of the function value (output) with respect to a change in its argument (input); e.g. the derivative of the position of a moving object with respect to time is the object's velocity and measures how quickly the position of the object changes as time changes.
In physics, a physical body or physical object (sometimes simply called a body or object) is a collection of masses, taken to be one. For example, a football can be considered an object but the ball also consists of many particles (pieces of matter ).
This category is for articles about specific, individual, mostly man-made objects (including matching sets). Buildings and bodies of water are not categorized here, nor are other geological, geographic or astronomical features. Classes of objects will be found under their respective collective names.
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Concrete nouns refer to physical entities that can, in principle at least, be observed by at least one of the senses (chair, apple, Janet, atom), as items supposed to exist in the physical world. Abstract nouns , on the other hand, refer to abstract objects : ideas or concepts ( justice , anger , solubility , duration ).
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A similar alternative definition of skeuomorph is "a physical ornament or design on an object made to resemble another material or technique". [ citation needed ] This definition is broader in scope, as it can be applied to design elements that still serve the same function as they did in a previous design.