Twice the speed of light.

Discussion in 'Physics & Math' started by Beaconator, Jul 18, 2021.

  1. QuarkHead Remedial Math Student Valued Senior Member

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    Proof required
     
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  3. Ssssssss Registered Senior Member

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    See any relativity textbook.
     
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  5. Write4U Valued Senior Member

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    An explosion is non-zero energy!
     
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  7. dart_ship Registered Member

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    then, Write4U, an object of mass would explode.
     
  8. Ssssssss Registered Senior Member

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    What is exploding and what are the products and what are you counting as part of the explosion and what not?
     
  9. DaveC426913 Valued Senior Member

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    Dart, you're new here so you're entitled to some catching up time.
    But if you want to be understood, it's really important that you learn to use the quote feature. It is not at all clear to whom these snippets of responses are directed.

    Please Register or Log in to view the hidden image!

     
  10. dart_ship Registered Member

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    an explosion is an element reaching boiling point (becoming a gas) without a release for it Ssssssss.
     
  11. Ssssssss Registered Senior Member

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    Not in general it isn't but in that particular case everything has mass.
     
  12. dart_ship Registered Member

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    okay DaveC426913.
     
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  13. dart_ship Registered Member

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    Ssssssss can you name something that does not have mass?
     
  14. Ssssssss Registered Senior Member

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    Light in vacuum.
     
  15. dart_ship Registered Member

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    do all elements exist in a state of either solid, liquid or gas (heating or cooling changes their state)?
     
  16. dart_ship Registered Member

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    could light in a vacuum reflect off objects Ssssssss?
     
  17. Ssssssss Registered Senior Member

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    I don't know. If only there was a 3,500km diameter lump of rock up in space where we could see if the Sun's light might reflect off it...
     
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  18. dart_ship Registered Member

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    Ssssssss would an object of zero mass pass through an object of mass?
     
  19. DaveC426913 Valued Senior Member

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    :looks out his workshop's transparent glass window, thoughtfully pondering dart's question, while working on his X-ray machine and listening to his radio:
     
  20. Write4U Valued Senior Member

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    https://www.desy.de/user/projects/Physics/Relativity/SR/light_mass.html#

    But IMO, light has mass. A photon at rest has zero mass. A photon in motion @ c acquires mass, i.e. "energy and momentum" = mass
     
  21. Write4U Valued Senior Member

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    How about a super nova?
    If sufficiently stimulated an object of mass does explode. A nuclear device has mass that explodes atom by atom after the nuclear process has been activated by inward pressure.
     
  22. Ssssssss Registered Senior Member

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    You really don't understand the first thing about this do you. Get a textbook.
     
  23. Write4U Valued Senior Member

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    E = Mc^2
    Question: does a photon @ c have energy?

    A photon @ c has energy (E). Therefore a photon @ c acquires the equivalent energy as a massive particle would at a lower speed.
     

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