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Related Concept Videos

Estimation of the Physical Quantities01:05

Estimation of the Physical Quantities

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On many occasions, physicists, other scientists, and engineers need to make estimates of a particular quantity. These are sometimes referred to as guesstimates, order-of-magnitude approximations, back-of-the-envelope calculations, or Fermi calculations. The physicist Enrico Fermi was famous for his ability to estimate various kinds of data with surprising precision. Estimating does not mean guessing a number or a formula at random. Instead, estimation means using prior experience and sound...
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Units and Standards of Measurement01:10

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A physical quantity is defined either by specifying its measurement method or by stating how it is calculated from other measurements. For example, consider a metallic cube. We might define its mass and dimensions by specifying methods for measuring them, such as using a weighing machine and a meter scale. Then, we could define the volume by stating that it is the cube of its side, and we could calculate the density as the mass divided by the volume.
Measurements of physical quantities are...
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Base Quantities and Derived Quantities01:14

Base Quantities and Derived Quantities

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In any system of units, the units for some physical quantities must be specified through a measurement process. These measurements are the base quantities of the system, and their units are the base units of the system. The algebraic combinations of the base values can then be used to express all other physical quantities. Each of these physical quantities is then referred to as a derived quantity, with each unit being referred to as a derived unit.
The International Organization for...
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Accuracy and Precision01:52

Accuracy and Precision

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Scientists typically make repeated measurements of a quantity to ensure the quality of their findings and to evaluate both the precision and the accuracy of their results. Measurements are said to be precise if they yield very similar results when repeated in the same manner. A measurement is considered accurate if it yields a result that is very close to the true or the accepted value. Precise values agree with each other; accurate values agree with a true value.  Highly accurate...
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Accuracy and Precision01:52

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Entropy01:18

Entropy

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The first law of thermodynamics is quantitatively formulated via an equation relating the internal energy of a system, the heat exchanged by it, and the work done on it. A quantitative formulation of the second law of thermodynamics leads to defining a state function, the entropy.
When an ideal gas expands isothermally, the disorder in the gas increases. From the molecular perspective, the gas molecules have more volume to move around in.
Consider an infinitesimal step in the expansion, which...
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Related Experiment Video

Updated: Apr 4, 2026

Evidence-based Knowledge Synthesis and Hypothesis Validation: Navigating Biomedical Knowledge Bases via Explainable AI and Agentic Systems
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On Quantity and Quality in Human Knowledge.

Jorge Wagensberg1

  • 1Faculty of Physics, University of Barcelona, Barcelona, Spain.

Biological Theory
|September 5, 2015
PubMed
Summary

This study explores how knowledge creation combines science, art, and revelation. The optimal blend depends on reality

Area of Science:

  • Epistemology
  • Philosophy of Science

Background:

  • Knowledge creation involves content complexity, methodology, and expression.
  • Understanding these elements is crucial for effective knowledge dissemination.

Purpose of the Study:

  • To propose a framework for understanding knowledge creation.
  • To explore the interplay of science, art, and revelation in knowledge production.

Main Methods:

  • Conceptual analysis of knowledge components.
  • Argumentation on the combination of science, art, and revelation.

Main Results:

  • Any knowledge creation method is a blend of science, art, and revelation.
  • The appropriate combination is contingent on the complexity of the subject matter.
Keywords:
ArtComplexityDialecticsEntropy of knowledgeIntelligibilityInterdisciplinarityObjectivityQuality of knowledgeRevelationScience

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Conclusions:

  • The quantity and quality of knowledge are linked to its audience.
  • This framework helps resolve historical misunderstandings in knowledge production.