A physical constant, sometimes fundamental physical constant or universal constant, is a physical quantity that is generally believed to be both universal in nature and have constant value in time. It is contrasted with a mathematical constant, which has a fixed numerical value, but does not directly involve any physical measurement. There are many physical constants in science, some of the most widely recognized being the speed of light in a vacuum c, the gravitational constant G, the Planck constant h, the electric constant ε0, and the elementary charge e. Physical constants can take many dimensional forms: the speed of light signifies a maximum speed for any object and its dimension is length divided by time; while the fine-structure constant α, which characterizes the strength of the electromagnetic interaction, is dimensionless. The term fundamental physical constant is sometimes used to refer to universal-but-dimensioned physical constants such as those mentioned above. Increasingly, however, physicists only use fundamental physical constant for dimensionless physical constants, such as the fine-structure constant α. Physical constant, as discussed here, should not be confused with other quantities called "constants", which are assumed to be constant in a given context without being fundamental, such as the "time constant" characteristic of a given system, or material constants (e.g., Madelung constant, electrical resistivity, and heat capacity). Since May 2019, all of the SI base units have been defined in terms of physical constants. As a result, five constants: the speed of light in vacuum, c; the Planck constant, h; the elementary charge, e; the Avogadro constant, NA; and the Boltzmann constant, kB, have known exact numerical values when expressed in SI units. The first three of these constants are fundamental constants, whereas NA and kB are of a technical nature only: they do not describe any property of the universe, but instead only give a proportionality factor for defining the units used with large numbers of atomic-scale entities. (Wikipedia).
How an Equilibrium Constant varies with Temperature - Thermodynamics - Physical Chemistry
Deriving a quantitative relationship to show how an equilibrium constant varies with temperature and so showing were Le Chatelier's Principle comes from in this context. Along the way, the Gibbs-Helmholtz van't Hoff equations are derived and used. My video for deriving the thermodynamics
From playlist Introductory Thermodynamics
From playlist Courses and Series
Physics - Thermodynamics 2: Ch 32.1 Def. and Terms (9 of 23) What is the Gas Constant?
Visit http://ilectureonline.com for more math and science lectures! In this video I will give and explain what is the gas constant and how it was determined. Next video in this series can be seen at: https://youtu.be/8N8TN0L5xiQ
From playlist PHYSICS 32.1 THERMODYNAMICS 2 BASIC TERMS
[APRIL FOOLS] How Constant are Constants? | feat. Higgsino ✨
Physical constants are called "constants", because they don't change their value over time. Things like the speed of light, Planck's constant, or Newton's constant are assumed to have the same value now as they had hundreds of years ago. Check out Higgsino's channel: https://www.youtube.co
From playlist Other videos Mr. Higgs appears in
Maximum and Minimum of a set In this video, I define the maximum and minimum of a set, and show that they don't always exist. Enjoy! Check out my Real Numbers Playlist: https://www.youtube.com/playlist?list=PLJb1qAQIrmmCZggpJZvUXnUzaw7fHCtoh
From playlist Real Numbers
Physical Science 1.8h - Graphs - Constant Acceleration
Position and Velocity graphs for the particular case of constant acceleration.
From playlist Physical Science Chapter 1 (Complete chapter)
The Planck Constant in 60 Seconds - Quantum Physics' Most Important Universal Constant #shorts
#shorts how the Planck constant (and the Reduced Planck Constant) are used in Quantum Mechanics - in 60 seconds! Hi everyone, what do you think of me having a go at uploading a few shorts discussing some physics ideas in 60 seconds or less? In this video, I wanted to introduce you to the
From playlist Parth G's #shorts
Physical chemistry is the study of macroscopic, and particulate phenomena in chemical systems in terms of the principles, practices, and concepts of physics such as motion, energy, force, time, #thermodynamics, #quantum chemistry, #statistical mechanics, analytical dynamics and chemical eq
From playlist Physical Chemistry
Planck's Constant - Sixty Symbols
This is one of the most important numbers in physics and is "unimaginably small" - or does it just seems small? More symbols explained at http://www.sixtysymbols.com/
From playlist From Sixty Symbols
Claim your SPECIAL OFFER for MagellanTV here: https://try.magellantv.com/historyoftheuniverse. Start your free trial TODAY so you can watch Faster Than Light: The Dream of Interstellar Flight, and the rest of MagellanTV’s science collection: https://www.magellantv.com/video/faster-than-lig
From playlist The Entire History of the Universe
What's Fine-Tuning in Physics? | Episode 1903 | Closer To Truth
What is fine-tuning in physics? Why do the “constants of nature” — masses of subatomic particles and strengths of forces like gravity and electromagnetism — have the values they do? Does fine-tuning “cry out” for explanation? Featuring interviews with Bernard Carr, Luke Barnes, Geraint Lew
From playlist Closer To Truth | Season 19
Gilles Dowek : Informatique et physique : quelques interactions
Recording during the thematic meeting : "Algorithm and Programming" the May 2, 2017 at the Centre International de Rencontres Mathématiques (Marseille, France) Filmmaker: Guillaume Hennenfent Find this video and other talks given by worldwide mathematicians on CIRM's Audiovisual Mathemat
From playlist Mathematical Physics
Boltzmann's constant | Physics | Khan Academy
Created by David SantoPietro. Watch the next lesson: https://www.khanacademy.org/test-prep/mcat/physical-processes/kinetic-molecular-theory-of-gas/v/heat-capacity-at-constant-volume-and-pressure?utm_source=YT&utm_medium=Desc&utm_campaign=physics Missed the previous lesson? https://www.kh
From playlist Physical processes | MCAT | Khan Academy
From playlist Courses and Series
Why Is 1/137 One of the Greatest Unsolved Problems In Physics?
Thank you to Squarespace for supporting PBS. Go to https://www.squarespace.com/pbs for a free trial, and when you are ready to launch, go to Squarespace.com/PBS to save 10% off your first purchase of a website or domain. PBS Member Stations rely on viewers like you. To support your local
From playlist The Standard Model Lagrangian Playlist
Heat capacity at constant volume and pressure | Physics | Khan Academy
Courses on Khan Academy are always 100% free. Start practicing—and saving your progress—now: https://www.khanacademy.org/science/in-in-class11th-physics/in-in-phy-kinetic-theory/in-in-kinetic-molecular-theory-of-gas/v/heat-capacity-at-constant-volume-and-pressure Created by David SantoPie
From playlist Physical processes | MCAT | Khan Academy
Wave Particle Duality and the Gravitational Constant | 50k Subscribers Q&A
Does light really switch between particle and wave? Why is the Universal Gravitational Constant so important? These (and more) questions answered. Thanks for sending them in! Hi everyone, I'm back with the promised Q&A. I can only thank you all for being so supportive and getting this cha
From playlist Quantum Physics by Parth G
What is the modern view of the cosmological constant?
Subscribe to our YouTube Channel for all the latest from World Science U. Visit our Website: http://www.worldscienceu.com/ Like us on Facebook: https://www.facebook.com/worldscienceu Follow us on Twitter: https://twitter.com/worldscienceu
From playlist Science Unplugged: Cosmology
Math for Game Developers: Fundamentals of Calculus
This video is a gentle introduction to the fundamentals of Calculus for Physics and Game Programmers. We'll start by looking at the basic concepts of physics simulation, deltatime, and proceed to discuss continuous functions and discrete functions. You'll learn about differentiation and
From playlist Summer of Math Exposition Youtube Videos