teaching physics today

Discussion in 'Physics' started by jmach, Jan 9, 2013.

  1. jmach

    Thread Starter New Member

    Jan 8, 2013
    2
    0
    what do physics teachers tell their classes in order to get around the fact that the official 9-11 story violates Newton's laws??
     
  2. MrChips

    Moderator

    Oct 2, 2009
    12,429
    3,360
    Because physics teachers understand Newton's Laws??
     
  3. tshuck

    Well-Known Member

    Oct 18, 2012
    3,531
    675
    I haven't heard this conspiracy theory yet, do, go on....
     
  4. MrChips

    Moderator

    Oct 2, 2009
    12,429
    3,360
    This is not a conspiracy theory. This is physics.
    A damaged building does not collapse straight downwards on to its footprint.
    On 9/11 three buildings did exactly the same thing.
     
  5. tshuck

    Well-Known Member

    Oct 18, 2012
    3,531
    675
    What's the third?
     
  6. MrChips

    Moderator

    Oct 2, 2009
    12,429
    3,360
    Building 7.
     
  7. Papabravo

    Expert

    Feb 24, 2006
    10,137
    1,786
    Und tell me Herr Doktor, vere did you getch your degree in civil engineering?
     
  8. tshuck

    Well-Known Member

    Oct 18, 2012
    3,531
    675
  9. WBahn

    Moderator

    Mar 31, 2012
    17,716
    4,788
    It's pretty common that they do, actually, particularly the type of construction used in those kinds of high-rise buildings. In fact, the building is designed to preferntially fail this way specifcially because you want it to drop in its footprint if at all possible. Demolition teams love bringing down these types of buildings because there is an amazing amount of room for error in planning the charges in order to bring the building down within its footprint. In the WTC towers this was made much easier by the fact that the structural integrity across the entire floors that were engulfed was being compromised and so once the first portion gave way it was all but inevitable that the sections nearby would give and so on creating a cascading failure across the floor that dropped everything above it almost straight downward with the design of the towers themselves acting to stabilize the progression.
     
  10. t06afre

    AAC Fanatic!

    May 11, 2009
    5,939
    1,222
    The explanation for this domino effect given by several documentaries seems to me plausible.
     
  11. tshuck

    Well-Known Member

    Oct 18, 2012
    3,531
    675
    I have yet to see any proof of a violation of the laws of physics....
     
  12. Papabravo

    Expert

    Feb 24, 2006
    10,137
    1,786
    If we forbid discussions of overunity and HHO we should sanction tis topic as well.
     
  13. tshuck

    Well-Known Member

    Oct 18, 2012
    3,531
    675
    Perhaps all conspiracy theories...

    On second though, perhaps not, as this is a technical site. Maybe just forbidding non-technical discussions of conspiracy theories(i.e. "I saw Bigfoot" or "Wake up sheeple! The moon landing was a hoax!") would suffice. As discussions of the physics behind the moon landing (waving flag) might be a decent conversation(stream of particles emitted from the sun).
     
  14. Wendy

    Moderator

    Mar 24, 2008
    20,765
    2,535
    If this were a definite conspiracy theory I would be temped to close it, but there is some wiggle room left, since the OP has not responded. This event has been analyzed pretty well to death, and has been stated, you can not violate the laws of physics (this is pretty much an oxymoron).
     
  15. WBahn

    Moderator

    Mar 31, 2012
    17,716
    4,788
    My problem with the thread is that it strikes me as a "bait and switch". The thread title is benign but the post itself doesn't have anything to do with how physics is taught and is nothing but a thinly veiled and disingenuous way to claim that 9/11 was something other than what it was.

    I don't have an objection to discussions that truly focus on technical considerations of conspiratorial claims, though I think they should be relegated to the Off-Topics foum.

    Just my $0.02 qorth.
     
Loading...