Physics and Mathematics

2,523 topics in this forum

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

   By Dubbelosix, April 29, 2019
   • 41 replies
   • 3.9k views
   • 
   • Vmedvil2
   • May 23, 2019

2. Scientists Modulate The Speed Of Light

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

3. Why Dark Matter Existence Disproves General Relativity?

   By rhertz, May 21, 2019
   • 5 replies
   • 1k views
   • 
   • LaurieAG
   • May 23, 2019

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

   By rhertz, May 22, 2019
   • 0 replies
   • 1.2k views
   • 
   • rhertz
   • May 22, 2019

5. 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
   • 796 views
   • 
   • John92
   • May 21, 2019

6. Unsolved Problems In Physics - Wikipedia

   By rhertz, May 18, 2019
   • 4 replies
   • 1.2k views
   • 
   • Dubbelosix
   • May 21, 2019

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

   By Dubbelosix, May 18, 2019
   • 11 replies
   • 989 views
   • 
   • Dubbelosix
   • May 20, 2019

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

   By rhertz, May 15, 2019
   • 7 replies
   • 1.1k views
   • 
   • Dubbelosix
   • May 17, 2019

9. 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
   • 1.2k views
   • 
   • John92
   • May 15, 2019

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

    By rhertz, May 10, 2019
    • 22 replies
    • 2.1k views
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    • Vmedvil2
    • May 14, 2019

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

    By rhertz, May 10, 2019
    • 5 replies
    • 1k views
    • 
    • ralfcis
    • May 14, 2019

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

    By rhertz, May 3, 2019
    • 9 replies
    • 1.8k views
    • 
    • OceanBreeze
    • May 14, 2019

13. Trigonometric Angles

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

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

    By rhertz, May 8, 2019
    • 15 replies
    • 1.3k views
    • 
    • ralfcis
    • May 9, 2019

15. Trigonometry

    By Khoxy, May 9, 2019
    • 7 replies
    • 964 views
    • 
    • ralfcis
    • May 9, 2019

16. The Concept Of Mass 1 2 3 4 13

    By Moronium, April 11, 2019
    • 215 replies
    • 14.5k views
    • 
    • Dubbelosix
    • May 7, 2019

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

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

18. 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
    • 3.2k views
    • 
    • OceanBreeze
    • May 6, 2019

19. A Proposal

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

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

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

21. Graphical Problem 1 2

    By Khoxy, April 29, 2019
    • 19 replies
    • 2.9k views
    • 
    • exchemist
    • April 30, 2019

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

    By rhertz, April 30, 2019
    • 5 replies
    • 909 views
    • 
    • exchemist
    • April 30, 2019

23. 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
    • 747 views
    • 
    • rhertz
    • April 30, 2019

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

    By rhertz, April 28, 2019
    • 5 replies
    • 949 views
    • 
    • rhertz
    • April 28, 2019

25. Einstein 1905: Is He Telling That Dm In 1/2Dmv^2 Has An Electromagnetic Nature?

    By rhertz, April 24, 2019
    • 2 replies
    • 843 views
    • 
    • exchemist
    • April 25, 2019