Philosophy Dictionary of ArgumentsHome
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| Quantities, physics: Quantities in physics are measurable properties of objects, processes or states. See also Scales, Proportions, Change, Motion, Processes, Flux, Space, Time, Spacetime, Metrisability, Measurements._____________Annotation: The above characterizations of concepts are neither definitions nor exhausting presentations of problems related to them. Instead, they are intended to give a short introduction to the contributions below. – Lexicon of Arguments. | |||
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J. Perdijon on Quantities (Physics) - Dictionary of Arguments
Perd 72 Quantities/Measure/Perdijon: size is connected to the property of quality, whereas the intensity is an expression of the amount, the quantity. Size: quality Value: Quantity Secondary quantities: not all physical quantities can be measured directly - E.g. interferometer: here, primary quantities have to be translated into secondary quantities: the invisible wavelengths into the movement of a pointer. Mass: complex concept, needs experiments and interpretation. Perd 73 Quantities/Measure/Perdijon: the value of most can be given by a simple number. But not vectors and tensors. However, they can be represented in the form of several scalar variables. Measurable quantities: Example: speed in one point: three components E.g. electric current: intensity and polarity E.g. distribution. Number of individuals in different classes e.g. Sum of values: for most quantities no problem: E.g. two lengths or two masses can be added: this additive commutative qunantity is called measurable quantities. These include in the wider sense also not summable sizes but whose sum can be defined by a law of physics. E.g. resistance can be measured, even if it is not summable. Contrary to this: Relative quantities: with them one can only determine whether they are greater than or equal to others e.g. temperature, e.g. hardness X 74 These quantities form an ordered set, they can be characterized. E.g. a point of time can be marked, a period of time, however, is measurable marked quantity: in extreme cases, the scale is reduced for them in such a way that there can only be expressed yes or no. We then speak of attributes E.g. Fit - size is usually defined at all points of a body. It is an average size that can be given as a common value for the entire volume. Perd 74 Measure/quantities/Perdijon: measurable quantities: by numbers (Def: summable!) Relative quantities: only comparison: E.g. temperature, hardness (not summable) Extreme values: E.g. length, diameter: cannot be used arbitrarily, but at the outermost points. >Quantities, >Quantities(Physics), >Qualities, >Measuring, >Physics._____________Explanation of symbols: Roman numerals indicate the source, arabic numerals indicate the page number. The corresponding books are indicated on the right hand side. ((s)…): Comment by the sender of the contribution. Translations: Dictionary of Arguments The note [Concept/Author], [Author1]Vs[Author2] or [Author]Vs[term] resp. "problem:"/"solution:", "old:"/"new:" and "thesis:" is an addition from the Dictionary of Arguments. If a German edition is specified, the page numbers refer to this edition. |
Perd I Jean Perdijon La mesure - Histoire, science et technique, Paris 2012 German Edition: Das Mass in Wissenschaft und Philosophie Bergisch Gladbach 2001 |
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> Counter arguments against Perdijon
> Counter arguments in relation to Quantities (Physics)
Ed. Martin Schulz, access date 2024-04-28