Physics & Math

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  1. Mark Turner

    Is negative energy possible ?

    Mark Turner, Jul 11, 2019 ... 2
    Replies:
    26
    Views:
    1,595
    Seattle
    Jul 18, 2019
  2. Mark Turner

    Are atoms some sort of cold fusion ?

    Mark Turner, Jul 6, 2019 ... 2
    Replies:
    26
    Views:
    2,544
    Mark Turner
    Jul 26, 2019
  3. Confused2

    Model yachts and gyroscopes

    Confused2, Jul 29, 2019 ... 2 3
    Replies:
    41
    Views:
    1,873
    Confused2
    Aug 4, 2019
  4. wegs

    Ring sizes by mm

    wegs, Jul 31, 2019
    Replies:
    9
    Views:
    535
    James R
    Aug 4, 2019
  5. Lostinspace

    Is CERN a waste of money ?

    Lostinspace, Jul 5, 2018 ... 5 6 7
    Replies:
    133
    Views:
    11,356
    James R
    Aug 4, 2019
  6. Mark Turner

    What is entropy ?

    Mark Turner, Jul 17, 2019 ... 2 3
    Replies:
    59
    Views:
    2,863
    arfa brane
    Aug 12, 2019
  7. wegs

    If there is no energy, does time exist?

    wegs, Jul 6, 2019 ... 8 9 10
    Replies:
    193
    Views:
    8,279
    phyti
    Aug 20, 2019
  8. Mike_Fontenot
    Locked

    A Simple Example, and a Test

    Mike_Fontenot, Aug 4, 2019
    Replies:
    2
    Views:
    734
    James R
    Aug 23, 2019
  9. Quantum Quack

    What would it take to prove Albert Einstein Wrong?

    Quantum Quack, Jul 23, 2019 ... 7 8 9
    Replies:
    164
    Views:
    6,697
    RainbowSingularity
    Aug 24, 2019
  10. arfa brane

    The connection between time and information

    arfa brane, Sep 2, 2019
    Replies:
    4
    Views:
    499
    phyti
    Sep 4, 2019
  11. Mike_Fontenot

    When Does an Observer Become an Inertial Observer?

    Mike_Fontenot, Aug 2, 2019 ... 4 5 6
    Replies:
    107
    Views:
    6,102
    QuarkHead
    Sep 5, 2019
  12. globali

    question for physicists-are all electrons the same?

    globali, Sep 10, 2019
    Replies:
    5
    Views:
    581
    DaveC426913
    Sep 10, 2019
  13. Magical Realist

    Rest mass of a photon

    Magical Realist, Aug 30, 2019 ... 2 3 4
    Replies:
    70
    Views:
    3,866
    James R
    Sep 12, 2019
  14. Michael 345

    42 solved

    Michael 345, Sep 9, 2019
    Replies:
    9
    Views:
    961
    TheFrogger
    Sep 12, 2019
  15. TheFrogger

    Staying up.

    TheFrogger, Sep 14, 2019
    Replies:
    1
    Views:
    555
    Jeeves
    Sep 15, 2019
  16. Tailspin

    Does quantum mechanics mean everything is quantised?

    Tailspin, Sep 17, 2019
    Replies:
    13
    Views:
    1,154
    exchemist
    Sep 21, 2019
  17. arfa brane

    What propagates in wave motion?

    arfa brane, Aug 31, 2019 ... 2
    Replies:
    24
    Views:
    1,553
    arfa brane
    Sep 22, 2019
  18. origin
    Locked

    Are photons energy? What is energy, anyway?

    origin, Aug 19, 2019 ... 20 21 22
    Replies:
    438
    Views:
    15,487
    James R
    Oct 1, 2019
  19. arfa brane
    Locked

    Twenty questions with James R

    arfa brane, Oct 2, 2019
    Replies:
    1
    Views:
    588
    James R
    Oct 3, 2019
  20. Willem

    Non-square Determinants

    Willem, Oct 2, 2019
    Replies:
    2
    Views:
    603
    Willem
    Oct 3, 2019
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