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Physics

The world of forces, particles and high-powered experiments.

Subforums

  1. Classical Physics

    Vector forces, gravity, acceleration, and other facets of mechanics.

    33.2k
    posts

  2. Relativity

    For discussion of problems relating to special and general relativity.

    38.5k
    posts

  3. Quantum Theory

    Quantum physics and related topics.

    27.8k
    posts

  4. Modern and Theoretical Physics

    Atomic structure, nuclear physics, etc.

    30k
    posts

  5. Astronomy and Cosmology

    Topics related to observation of space and any related phenomena.

    49.1k
    posts

3545 topics in this forum

  1. Family claim Amber Alert ruptured son's eardrums, file lawsuit against Apple

    By LaraKnowles,
    • 10 replies
    • 651 views

  2. Pumping water up with minimal power...

    By Externet,
    • 1 reply
    • 181 views

  3. High priority problem in Physics: real equation of force is F = ma and not F = dp/dt

    By martillo,
    • 1 reply
    • 390 views

  4. Question about Basics of Gravity 1 2 3 4

    By tylers100,
    • 97 replies
    • 9.2k views

  5. Why do we use kelvin to measure heat?

    By grayson,
    • 8 replies
    • 616 views

  6. Radio Frequency / Microwave Radiation

    By chrisa,
    • 21 replies
    • 1.3k views

  7. Fluctuating magnetic fields cause heart attacks and strokes to double! 1 2

    By LaraKnowles,
    • 46 replies
    • 3k views

  8. Recycling Heat 1 2

    By Photon Guy,
    • 30 replies
    • 1.8k views

  9. Find the electric current required.

    By Kakos87,
    • 0 replies
    • 337 views

  10. Group Fluid Framework for accurately measuring fluid dynamics.

    By grayson,
    • 2 replies
    • 335 views

  11. the definition of energy

    By mar_mar,
    • 19 replies
    • 1.2k views

  12. "footage" of current passing through wire

    By robert1978bp,
    • 0 replies
    • 242 views

  13. Is entropy always low in a way?

    By Tristan L,
    • 1 reply
    • 252 views

  14. Will entropy be low much of the time? 1 2

    By Tristan L,
    • 42 replies
    • 33.1k views

  15. Radiation and Lambert's Cosine Law

    By Dewsquad,
    • 1 reply
    • 293 views

  16. Looking for pdfs

    By grayson,
    • 1 reply
    • 294 views

  17. Photon is massless why? 1 2

    By Muhammad Owais Isaac,
    • 47 replies
    • 4.1k views

  18. What is 210J

    By johnsri,
    • 2 replies
    • 293 views

  19. Matter waves (split from Photon is massless why?) 1 2 3 4 5

    By martillo,
    • 119 replies
    • 6.3k views

  20. Forgotten energy in interactions of particles with opposite charge. 1 2

    By martillo,
    • 31 replies
    • 1.5k views

  21. Mass of a photon particle...

    By Externet,
    • 12 replies
    • 1.1k views

  22. Mushy questions about gravitational waves

    By Danijel Gorupec,
    • 12 replies
    • 1.6k views

  23. Is this possible? Any thermodynamics dynamos out there want to weigh in?

    By K8H,
    • 6 replies
    • 641 views

  24. JOBS

    By Gian,
    • 8 replies
    • 737 views

  25. Any beneficial uses for tritium ?

    By Externet,
    • 16 replies
    • 877 views
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