While physics aims to discover universal laws, its theories lie in explicit domains of applicability. Loosely speaking, the laws of classical physics accurately describe systems whose important length scales are greater than the atomic scale and whose motions are much slower than the speed of light.
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physical law. (physics). A property of a physical phenomenon, or a relationship between the various quantities or qualities which may be used to describe the phenomenon, that applies to all members of a broad class of such phenomena, without exception.
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Physics intersects with many interdisciplinary areas of research, such as biophysics and quantum chemistry, and the boundaries of physics are not rigidly defined.
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Physical law. A term that designates four different concepts: (1) objective pattern (or natural regularity), (2) formula purporting to represent an objective pattern, (3) law-based rule (or uniform procedure), and (4) principle concerning any of the preceding.
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Ohm's law. A law stating that the current in an electric circuit is equal to the voltage divided by the resistance. The current increases as the voltage increases, but decreases as the resistance increases.
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Classical physics is generally concerned with matter and energy on the normal scale of observation, while much of modern physics is concerned with the behavior of matter and energy under extreme conditions or on a very large or very small scale.
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An example of a law of type 4 is: Newton's laws of motion are invariant under a Galileo transformation. See Newton's laws of motion. A physical law of type 1, or objective pattern, is a constant relation among two or more properties of a physical entity. In principle, any such pattern can be conceptualized in different ways, that is, as alternative laws of type 2. The history of theoretical physics is to a large extent a sequence of laws of type 2.
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By the 19th century, physics was realized as a discipline distinct from philosophy and the other sciences. Physics, as with the rest of science, relies on philosophy of science and its scientific method to advance our knowledge of the physical world.
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Physics is also called the fundamental science because the subject of study of all branches of natural science like chemistry, astronomy, geology and biology are constrained by laws of physics, similar to how chemistry is often called the central science because of its role in linking the physical sciences.
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Ohm's law. n. 1. (General Physics) the principle that the electric current passing through a conductor is directly proportional to the potential difference across it, provided that the temperature remains constant. The constant of proportionality is the resistance of the conductor.
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laws in physics definition
In physics, law is a property of a physical phenomenon, or a relationship between the various quantities or qualities which may be used to describe the phenomenon, that applies to all members of a broad class of such phenomena, without exception.