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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.

    33.4k
    posts

  2. Relativity

    For discussion of problems relating to special and general relativity.

    38.7k
    posts

  3. Quantum Theory

    Quantum physics and related topics.

    27.8k
    posts

  4. Modern and Theoretical Physics

    Atomic structure, nuclear physics, etc.

    30.2k
    posts

  5. Astronomy and Cosmology

    Topics related to observation of space and any related phenomena.

    49.6k
    posts

3555 topics in this forum

  1. A few questions

    By Steven Craig,
    • 4 replies
    • 1.1k views

  2. Hollow Earth / no gravity

    By richard quest,
    • 4 replies
    • 1.6k views

  3. Acceleration

    By Tourist,
    • 1 reply
    • 870 views

  4. warm air rises right?

    By fattyjwoods,
    • 8 replies
    • 1.4k views

  5. How does the hydrothopter work ?

    By Externet,
    • 12 replies
    • 3.9k views

  6. Resistent Material.

    By foodchain,
    • 5 replies
    • 1.2k views

  7. NASA Virtual Lab

    By alan2here,
    • 2 replies
    • 1k views

  8. Entropy and Evolution

    By foodchain,
    • 3 replies
    • 1.1k views

  9. Energy Bands.

    By foodchain,
    • 6 replies
    • 1.2k views

  10. Why can you blow a small flame out? 1 2

    By chunhon,
    • 25 replies
    • 3.2k views

  11. Need help identifying a device

    By alan2here,
    • 8 replies
    • 1.7k views

  12. tesla's inventions

    By tomgwyther,
    • 10 replies
    • 1.7k views

  13. Stars

    By Lawle$$,
    • 3 replies
    • 1.1k views

  14. Secondary Emission Radiation

    By imp,
    • 6 replies
    • 1.2k views

  15. Pendulum and coupling to Earth's spin

    By abskebabs,
    • 10 replies
    • 1.4k views

  16. cool x-ray tech (AS&E backscatter)

    By Dak,
    • 1 reply
    • 1.2k views

  17. Photon Stats

    By YT2095,
    • 6 replies
    • 2.5k views

  18. Slow-moving immiscible liquid

    By darXide,
    • 1 reply
    • 1k views

  19. a REAL SuperHero!

    By sfpublic,
    • 11 replies
    • 1.5k views

  20. Beta decay

    By gonelli,
    • 8 replies
    • 1.4k views

  21. thin film electric resistance

    By hercule,
    • 9 replies
    • 1.4k views

  22. voltage & energy

    By lboogy,
    • 6 replies
    • 1.5k views

  23. Is light visible ? 1 2

    By Antony-Jones,
    • 37 replies
    • 3.8k views

  24. formula for volts on a transformer

    By lboogy,
    • 4 replies
    • 25.4k views

  25. Compressed Gas Cylinder Use

    By imp,
    • 16 replies
    • 2.1k views
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