In astrophysics, what is referred to as "entropy" is actually the adiabatic constant derived as follows. Using the first law of thermodynamics for a quasi-static, infinitesimal process for a hydrostatic system For an ideal gas in this special case, the internal energy, U, is only a function of the temperature T; therefore the partial derivative of heat capacity with respect to T is identically the same as the full derivative, yielding through some manipulation Further manipulation using the differential version of the ideal gas law, the previous equation, and assuming constant pressure, one finds For an adiabatic process and recalling , one finds One can solve this simple differential equation to find This equation is known as an expression for the adiabatic constant, K, also called the adiabat. From the ideal gas equation one also knows where is Boltzmann's constant.Substituting this into the above equation along with and for an ideal monatomic gas one finds where is the mean molecular weight of the gas or plasma; and is the mass of the Hydrogen atom, which is extremely close to the mass of the proton, , the quantity more often used in astrophysical theory of galaxy clusters.This is what astrophysicists refer to as "entropy" and has units of [keV cm2]. This quantity relates to the thermodynamic entropy as (Wikipedia).
Teach Astronomy - Entropy of the Universe
http://www.teachastronomy.com/ The entropy of the universe is a measure of its disorder or chaos. If the laws of thermodynamics apply to the universe as a whole as they do to individual objects or systems within the universe, then the fate of the universe must be to increase in entropy.
From playlist 23. The Big Bang, Inflation, and General Cosmology 2
Entropy is often taught as a measure of how disordered or how mixed up a system is, but this definition never really sat right with me. How is "disorder" defined and why is one way of arranging things any more disordered than another? It wasn't until much later in my physics career that I
From playlist Thermal Physics/Statistical Physics
Physics - Thermodynamics 2: Ch 32.7 Thermo Potential (10 of 25) What is Entropy?
Visit http://ilectureonline.com for more math and science lectures! In this video explain and give examples of what is entropy. 1) entropy is a measure of the amount of disorder (randomness) of a system. 2) entropy is a measure of thermodynamic equilibrium. Low entropy implies heat flow t
From playlist PHYSICS 32.7 THERMODYNAMIC POTENTIALS
Entropy Explained In 60 Seconds!! #Thermodynamics #Chemistry #Physics #Math #NicholasGKK #Shorts
From playlist Heat and Chemistry
Astronomy: The Big Bang (29 of 30) The Big Bang and Entropy
Visit http://ilectureonline.com for more math and science lectures! In this video I will explain the Big Bang and entropy of how the universe achieve thermal equilibrium.
From playlist ASTRONOMY 25 THE BIG BANG
Physics - Thermodynamics: (1 of 5) Entropy - Basic Definition
Visit http://ilectureonline.com for more math and science lectures! In this video I will explain and help you understand entropy.
From playlist PHYSICS - THERMODYNAMICS
Is ENTROPY Really a "Measure of Disorder"? Physics of Entropy EXPLAINED and MADE EASY
This is how I personally wrapped my head around the idea of entropy! I found the statistical mechanics explanation much easier to grasp than the thermodynamics (original) one. Hey everyone, I'm back with another video, and this one has been highly requested! I really enjoy making videos a
From playlist Thermodynamics by Parth G
A better description of entropy
I use this stirling engine to explain entropy. Entropy is normally described as a measure of disorder but I don't think that's helpful. Here's a better description. Visit my blog here: http://stevemould.com Follow me on twitter here: http://twitter.com/moulds Buy nerdy maths things here:
From playlist Best of
Entropy: The Heat Death of The Universe
Entropy: The Heat Death of The Universe - https://aperture.gg/heatdeath Sign up with Brilliant for FREE and start learning today: https://brilliant.org/aperture "Maximum Entropy" Hoodies — Available Now: https://aperture.gg/entropy As the arrow of time pushes us forward, each day the univ
From playlist Science & Technology 🚀
Buoyancy effects in dilute astrophysical plasmas by Prateek Sharma
Summer school and Discussion Meeting on Buoyancy-driven flows DATE: 12 June 2017 to 20 June 2017 VENUE: Ramanujan Lecture Hall, ICTS, Bengaluru Buoyancy plays a major role in the dynamics of atmosphere and interiors of planets and stars, as well as in engineering applications. This field
From playlist Summer school and Discussion Meeting on Buoyancy-driven flows
Statistical Mechanics of Gravitational N-Body Systems - S. Tremaine - 2/24/2015
Introduction by Peter Goldreich. Learn more about the Inaugural Celebration and Symposium of the Walter Burke Institute for Theoretical Physics: https://burkeinstitute.caltech.edu/workshops/Inaugural_Symposium Produced in association with Caltech Academic Media Technologies. ©2015 Califo
From playlist Walter Burke Institute for Theoretical Physics - Dedication and Inaugural Symposium - Feb. 23-24, 2015
How ‘heat death’ will destroy the universe | Katie Mack | Big Think
How ‘heat death’ will destroy the universe Watch the newest video from Big Think: https://bigth.ink/NewVideo Learn skills from the world's top minds at Big Think Edge: https://bigth.ink/Edge ---------------------------------------------------------------------------------- The expansion
From playlist The universe explained | Big Think
Learning Multiscale Physics with Deep Neural Networks - Mallat - Workshop 2 - CEB T3 2018
Stephane Mallat (College de France/ENS) / 26.10.2018 Learning Multiscale Physics with Deep Neural Networks ---------------------------------- Vous pouvez nous rejoindre sur les réseaux sociaux pour suivre nos actualités. Facebook : https://www.facebook.com/InstitutHenriPoincare/ Twitte
From playlist 2018 - T3 - Analytics, Inference, and Computation in Cosmology
Dynamic formation of compact binaries (Course 4 - Clusters) - Lecture 1 by Sourav Chatterjee
Summer School on Gravitational-Wave Astronomy ORGANIZERS: Parameswaran Ajith, K. G. Arun and Bala R. Iyer DATE: 13 August 2018 to 24 August 2018 VENUE: Madhava Lecture Hall, ICTS, Bangalore This school is part of the annual ICTS summer schools on gravitational-wave (GW) astronomy. Rece
From playlist Summer School on Gravitational-Wave Astronomy - 2018
Galaxy Clusters (Lecture 2) by Stefano Borgani
Program Cosmology - The Next Decade ORGANIZERS : Rishi Khatri, Subha Majumdar and Aseem Paranjape DATE : 03 January 2019 to 25 January 2019 VENUE : Ramanujan Lecture Hall, ICTS Bangalore The great observational progress in cosmology has revealed some very intriguing puzzles, the most i
From playlist Cosmology - The Next Decade
Black Holes - II (Lecture - 05) by G Srinivasan
Summer School on Gravitational-Wave Astronomy DATE: 17 July 2017 to 28 July 2017 VENUE: Madhava Lecture Hall, ICTS Bangalore This school is a part of the annual ICTS summer schools in gravitational wave astronomy. This year’s school will focus on the physics and astrophysics of compact
From playlist Summer School on Gravitational-Wave Astronomy - 2017
Darkness Visible: Shedding New Light on Black Holes
Black holes may hold the key to understanding the most fundamental truths of the universe, but how do you see something that’s, well, black? Astronomers think they have the answer. Thanks to a global array of radio telescopes that turn the Earth into a giant receiver, we may soon have the
From playlist Watch Our Most Popular Programs
Christian Ott: Modeling the Death of Massive Stars
PROGRAM: NUMERICAL RELATIVITY DATES: Monday 10 Jun, 2013 - Friday 05 Jul, 2013 VENUE: ICTS-TIFR, IISc Campus, Bangalore DETAL Numerical relativity deals with solving Einstein's field equations using supercomputers. Numerical relativity is an essential tool for the accurate modeling of a wi
From playlist Numerical Relativity
http://www.teachastronomy.com/ Entropy is a measure of disorder. The theory of thermodynamics states that entropy will tend to increase in any physical system. It also shows that heat is the most disordered form of energy because it represents the random motion of atoms and molecules, so
From playlist 15. Stars 2
Jonathan Gair - Rapid and robust parameter estimation for gravitational wave observations
Recorded 03 December 2021. Jonathan Gair of the Max Planck Institute for Gravitational Physics, Albert Einstein Institute, presents "Rapid and robust parameter estimation for gravitational wave observations" at IPAM's Workshop IV: Big Data in Multi-Messenger Astrophysics. Abstract: Over th
From playlist Workshop: Big Data in Multi-Messenger Astrophysics