Classical Physics

2828 topics in this forum

1. Youtube says the 2nd Law is Broken. 1 2 3 4

   By sethoflagos, July 2, 2020
   • 88 replies
   • 399.6k views
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   • sethoflagos
   • January 6, 2021

2. Why is a magnetic field of a permanent magnet not considered energy? 1 2

   By Victheromanian, October 11, 2020
   • 30 replies
   • 232.3k views
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   • Victheromanian
   • October 16, 2020

3. i hat, j hat, and k hat

   By hotcommodity, September 28, 2006
   • 11 replies
   • 163.1k views
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   • ajb
   • May 20, 2013

4. Newton's third law pair 1 2 3 4 6

   By Nedcim, May 25, 2020
   • 129 replies
   • 116.4k views
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   • Phi for All
   • June 18, 2020

5. DO objects fall at the same speed? NO! 1 2 3 4

   By Ali Algebra, December 31, 2005
   • 91 replies
   • 75.9k views
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   • xyzt
   • June 14, 2014

6. Electricity (split from Science Project (static charge)) 1 2 3 4

   By westom, December 18, 2019
   • 91 replies
   • 63k views
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   • Phi for All
   • January 9, 2020

7. What is the most dense material that can exist on Earth? 1 2 3

   By Lan(r)12, February 13, 2009
   • 65 replies
   • 60.4k views
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   • Guardian54
   • October 11, 2014

8. You may see this on Myth Busters

   By Paul_J, November 7, 2009
   • 2 replies
   • 53.9k views
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   • Paul_J
   • November 7, 2009

9. Maxwell's equations: meaning, derivation and applicability 1 2 3 4 7

   By ambros, March 19, 2010
   • 157 replies
   • 49k views
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   • Mr Skeptic
   • April 7, 2010

10. Accelerated world 1 2

    By michel123456, October 7, 2019
    • 27 replies
    • 45.8k views
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    • Phi for All
    • October 8, 2019

11. Photons don’t work 1 2

    By timharvey027, March 10, 2020
    • 32 replies
    • 42.4k views
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    • joigus
    • May 13, 2020

12. How can the cosmos be eternal? 1 2

    By Hobs, February 19, 2020
    • 32 replies
    • 40.5k views
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    • Strange
    • May 3, 2020

13. Kender Solar Engine 1 2 3 4 8

    By mikedmonds, September 7, 2009
    • 193 replies
    • 37.6k views
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    • Sayonara
    • October 3, 2010

14. Fan moving a Sailboat 1 2

    By mooeypoo, September 5, 2006
    • 41 replies
    • 37.2k views
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    • Gerardo Bridges
    • April 30, 2017

15. What is the simplest definition of time? 1 2

    By R A J A, August 17, 2011
    • 41 replies
    • 36.7k views
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    • Appolinaria
    • October 29, 2011

16. Magnetic field lines and iron filings 1 2

    By CasualKilla, March 16, 2015
    • 42 replies
    • 36.3k views
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    • Ynan
    • May 16, 2018

17. A spinning circle

    By Dan, December 18, 2006
    • 9 replies
    • 36.3k views
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    • Sisyphus
    • February 26, 2007

18. calculating top speed

    By pworkmaster7336, August 2, 2008
    • 13 replies
    • 33.7k views
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    • pworkmaster7336
    • August 31, 2008

19. Thermodynamics - Why is 100% efficiency impossible?

    By ironizer, October 16, 2007
    • 18 replies
    • 33.6k views
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    • boma
    • October 27, 2007

20. Why do cathode ray tubes have to contain a gas at LOW PRESSURE?

    By mahela007, July 1, 2009
    • 17 replies
    • 30.7k views
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    • Maheen
    • September 11, 2017

21. Head On Collision

    By Cranky, October 23, 2011
    • 7 replies
    • 30.2k views
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    • Cranky
    • October 24, 2011

22. Force x Time?

    By Baby Astronaut, September 8, 2009
    • 8 replies
    • 29.7k views
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    • ajb
    • September 9, 2009

23. Question about axis of rotation and center of gravity 1 2

    By SilentSky23, May 13, 2020
    • 27 replies
    • 29.3k views
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    • joigus
    • May 14, 2020

24. How much weight can a helium balloon lift?

    By Anagoge, October 3, 2009
    • 5 replies
    • 29.3k views
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    • Anagoge
    • October 4, 2009

25. An object at rest "tends" to stay at rest? 1 2

    By Baby Astronaut, January 9, 2009
    • 43 replies
    • 28.7k views
    • 
    • Samm
    • December 24, 2011