Physics and Mathematics

2,524 topics in this forum

1. A Genuine Question For The Budding Posters Here

   By Dubbelosix, May 21, 2019
   • 13 replies
   • 1.2k views
   • 
   • Dubbelosix
   • May 24, 2019

2. Pre-Big Bang Phase And The Implications For Physics 1 2 3

   By Dubbelosix, April 29, 2019
   • 41 replies
   • 4.4k views
   • 
   • Vmedvil2
   • May 23, 2019

3. Scientists Modulate The Speed Of Light

   By Dubbelosix, May 20, 2019
   • 8 replies
   • 1.1k views
   • 
   • Vmedvil2
   • May 23, 2019

4. Why Dark Matter Existence Disproves General Relativity?

   By rhertz, May 21, 2019
   • 5 replies
   • 1.2k views
   • 
   • LaurieAG
   • May 23, 2019

5. Japan, Muon's Family, Str, Time Dilation, And History

   By rhertz, May 22, 2019
   • 0 replies
   • 1.3k views
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   • rhertz
   • May 22, 2019

6. Usage Of Absorption And Magnitude Mode Spectra

   By John92, May 20, 2019   

   • nmr spectroscopy
   • absorption mode
   • (and 1 more)

     Tagged with:

     • nmr spectroscopy
     • absorption mode
     • magnitude mode
   • 3 replies
   • 911 views
   • 
   • John92
   • May 21, 2019

7. Unsolved Problems In Physics - Wikipedia

   By rhertz, May 18, 2019
   • 4 replies
   • 1.4k views
   • 
   • Dubbelosix
   • May 21, 2019

8. A Look Back At The Semi-Classical Friedmann Equation

   By Dubbelosix, May 18, 2019
   • 11 replies
   • 1.2k views
   • 
   • Dubbelosix
   • May 20, 2019

9. Does General Relativity Explain The Random Delay In Halley's Comet Orbit?

   By rhertz, May 15, 2019
   • 7 replies
   • 1.2k views
   • 
   • Dubbelosix
   • May 17, 2019

10. What Is The True Way To Determine Time Parameters From Semilog Graph?

    By John92, May 13, 2019   

    • nmr
    • curve fitting
    • (and 3 more)

      Tagged with:

      • nmr
      • curve fitting
      • semilog
      • t2 relaxation
      • t2 time
    • 3 replies
    • 1.4k views
    • 
    • John92
    • May 15, 2019

11. Probability For A Hydrogen Atom To Be 13 Billion Years Old? 1 2

    By rhertz, May 10, 2019
    • 22 replies
    • 2.4k views
    • 
    • Vmedvil2
    • May 14, 2019

12. From 1887 To 1905, Does Anyone Know A Fourth Method To Derivate Lorentz Transforms?

    By rhertz, May 10, 2019
    • 5 replies
    • 1.2k views
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    • ralfcis
    • May 14, 2019

13. Size Of Observable Universe, Hubble's Constant, Age And Inflation. What Results?

    By rhertz, May 3, 2019
    • 9 replies
    • 2.1k views
    • 
    • OceanBreeze
    • May 14, 2019

14. Trigonometric Angles

    By Khoxy, May 10, 2019
    • 6 replies
    • 1.2k views
    • 
    • GAHD
    • May 11, 2019

15. Comparison Between Economic's And Physic's Theories

    By rhertz, May 8, 2019
    • 15 replies
    • 1.5k views
    • 
    • ralfcis
    • May 9, 2019

16. Trigonometry

    By Khoxy, May 9, 2019
    • 7 replies
    • 1.1k views
    • 
    • ralfcis
    • May 9, 2019

17. The Concept Of Mass 1 2 3 4 13

    By Moronium, April 11, 2019
    • 215 replies
    • 18.3k views
    • 
    • Dubbelosix
    • May 7, 2019

18. Can The Expression Dm =De/c^2 Be Derived From Classic Thermodynamics?

    By rhertz, May 6, 2019
    • 4 replies
    • 934 views
    • 
    • exchemist
    • May 6, 2019

19. Is The Bohr's Model Of Atoms Still Used To Analyze Emission And Absorption Of Em Energy? 1 2

    By rhertz, May 1, 2019
    • 23 replies
    • 3.5k views
    • 
    • OceanBreeze
    • May 6, 2019

20. A Proposal

    By MarkBrezina, May 5, 2019
    • 3 replies
    • 951 views
    • 
    • MarkBrezina
    • May 5, 2019

21. Examples Of Theories That Were Modified Without Consent Of Their Original Authors

    By rhertz, April 24, 2019
    • 9 replies
    • 1.1k views
    • 
    • Dubbelosix
    • May 1, 2019

22. Graphical Problem 1 2

    By Khoxy, April 29, 2019
    • 19 replies
    • 3.4k views
    • 
    • exchemist
    • April 30, 2019

23. Solid Angle From Our Eyes Toward The Moon And The Sun Is The Same. Any Explanation?

    By rhertz, April 30, 2019
    • 5 replies
    • 1k views
    • 
    • exchemist
    • April 30, 2019

24. What Do You Think About That A 1879 Stefan's Law Be Used To Calculate Star Radius Or Temperature?

    By rhertz, April 30, 2019
    • 0 replies
    • 994 views
    • 
    • rhertz
    • April 30, 2019

25. What Do You Think About Photon To Photon Scattering?

    By rhertz, April 28, 2019
    • 5 replies
    • 1.1k views
    • 
    • rhertz
    • April 28, 2019