Physics Forums Insights
  • Physics
    • Mechanics
    • Thermodynamics
    • Electromagnetism
    • Fluids
    • Optics
    • Particles
    • Quantum
    • Relativity
    • Biophysics
  • Astronomy
    • Astrophysics
    • Cosmology
    • Observing
  • Mathematics
    • Algebra
    • Analysis
    • Geometry
    • Number Theory
    • Probability
  • Computing
    • Programming
    • Electronics
    • Imaging
  • Science Culture
    • Education
    • Careers
    • Philosophy
    • Profiles
    • Trivia
  • Forums
  • Click to open the search input field Click to open the search input field Search
  • Menu Menu

Tag Archive for: second law

perpetual motion machines

Why We Don’t Discuss Perpetual Motion Machines (PMM)

January 30, 2020
/
12 Comments
Authorship Authorship Contributions From Anorlunda Introduction You may want to believe the article you read, or the video you saw, or you may be very…
https://www.physicsforums.com/insights/wp-content/uploads/2020/01/perpetual_motion_machines.png 135 240 russ_watters https://www.physicsforums.com/insights/wp-content/uploads/2019/02/Physics_Forums_Insights_logo.png russ_watters2020-01-30 07:15:512026-02-17 07:17:56Why We Don’t Discuss Perpetual Motion Machines (PMM)
entropy

How to Determine the Change in Entropy

August 22, 2016
/
9 Comments
How do you determine the change in entropy for a closed system that is subjected to an irreversible process?Here are some typical questions we get…
https://www.physicsforums.com/insights/wp-content/uploads/2016/08/entropy.png 135 240 Chestermiller https://www.physicsforums.com/insights/wp-content/uploads/2019/02/Physics_Forums_Insights_logo.png Chestermiller2016-08-22 13:23:182025-01-28 07:47:03How to Determine the Change in Entropy
earlyuniverse

Was the Early Universe in a Disordered State?

December 29, 2015
No. The second law of thermodynamics says that entropy can only increase, so if the early universe had been in a state of maximum entropy, then the cosmos…
https://www.physicsforums.com/insights/wp-content/uploads/2015/12/earlyuniverse.png 135 240 bcrowell https://www.physicsforums.com/insights/wp-content/uploads/2019/02/Physics_Forums_Insights_logo.png bcrowell2015-12-29 23:45:482026-02-16 18:33:08Was the Early Universe in a Disordered State?
Thermodynamics

Understanding the Second Law of Thermodynamics Clearly

April 30, 2015
/
73 Comments
Introduction The second law of thermodynamics and the associated concept of entropy have been sources of confusion for thermodynamics students for centuries.…
https://www.physicsforums.com/insights/wp-content/uploads/2015/04/thermo_tut.png 135 240 Chestermiller https://www.physicsforums.com/insights/wp-content/uploads/2019/02/Physics_Forums_Insights_logo.png Chestermiller2015-04-30 18:16:082026-07-27 13:59:00Understanding the Second Law of Thermodynamics Clearly

Popular Articles

  • Introduction to Causal Perturbation Theory
  • A Geometrical View of Time Dilation and the Twin Paradox
  • Mixing vs Beating: Superheterodyne & Beat Frequency
  • Finding Niches for Publishable Undergraduate Research
  • Black Hole Thermodynamics: Four Laws Explained — Guide
  • How to Use the Spaghetti-Twist Method to Align DNA
  • Why We Don’t Discuss Perpetual Motion Machines (PMM)
  • False Physics Major Dichotomy: Theorist or Experimentalist?
  • Fixing Scientific Integrity: Teachers, Editors, and Data
  • Struggles with the Continuum – Freeman Dyson and QED

Physics Forums

  • Classical Physics
  • Atomic and Condensed Matter
  • Quantum Physics
  • Special and General Relativity
  • Beyond the Standard Model
  • High Energy, Nuclear, Particle Physics
  • Astronomy and Astrophysics
  • Cosmology
  • Other Physics Topics

Receive Insights Articles to Your Inbox

Enter your email address:

Blog Information

  • Become a Member!
  • Write for Us!
  • Table of Contents
  • Blog Author List

Popular Topics

black holes (23) classical physics (35) education (23) FAQ (58) General (230) general relativity (23) Graduate (185) gravity (25) Guide (86) interview (49) mathematics (39) mathematics self-study (21) Physicist (26) Quantum Field Theory (34) quantum mechanics (36) quantum physics (24) relativity (40) Special Relativity (22) Tutorial (147) Undergraduate (287)
2026 © Physics Forums, ALL RIGHTS RESERVED - Contact Us - Privacy Policy - About PF Insights
  • Link to X
  • Link to Facebook
  • Link to LinkedIn
Scroll to top Scroll to top Scroll to top