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microwave oven power cooking levels?

Discussion in 'Electronic Repair' started by wave, Dec 8, 2004.

  1. Like waking up with measles?

    "Sorry, I woke up with a bad case of Diana Rigg this morning."
    "Could be worse, you could have the Thatchers."
     
  2. Guest


    This is only true for bending and compression where buckling is a
    concern. For tension, however, the profile is irrelevant and the
    stress is simply calculated as corss-sectional area / tension.
    Ever see a power line in compression?
     
  3. NSM

    NSM Guest

    | >For a given weight of material, maximum strength is obtained by
    distributing
    | >it over the greatest cross sectional area possible, up to the point at
    which
    | >it becomes too thin to resist buckling.

    | This is only true for bending and compression where buckling is a
    | concern. For tension, however, the profile is irrelevant and the
    | stress is simply calculated as corss-sectional area / tension.
    | Ever see a power line in compression?

    But at some point as the tension increases vs. the wall thickness the tube
    will neck in on itself.

    N
     
  4. Jim Adney

    Jim Adney Guest

    I'm not a ship expert, but when I visited the Queen ??? in Long Island
    many years ago, I was impressed by the construction of the hull. The
    plates were mayby 4-6" thick and not all that big: no dimension much
    over 16'. The joints were overlapped with big rivet heads every few
    inches. The scale of the joinery boggled my mind.

    I'm sure the Titanic must have been similar, yet it sank. I guess you
    can bend/break anything if you have virtually infinite forces to play
    with.

    -
     
  5. Jim Adney

    Jim Adney Guest

    Yeah, really! The photos I've seen look absolutely beautiful.

    There's a much less challenging bridge in LeHavre that is still
    gorgeous, as well as breathtaking when you realize how high you will
    be going on it.

    -
     
  6. Jim Adney

    Jim Adney Guest

    Are you sure you're not thinking of the WW II Liberty Ships? They had
    some kind of cold transition problem, at least early in the war.

    Someone else will have to fill in the details on that.

    -
     
  7. James Sweet

    James Sweet Guest

    I did a quick Google search to refresh my memory, appears that high sulphur
    as well as high phosphorus were at least contributing factors. Fascinating
    at any rate.
    http://dwb.unl.edu/Teacher/NSF/C10/C10Links/chemistry.about.com/library/weekly/aa022800a.htm
     
  8. NSM

    NSM Guest

    |
    | >That's why they pay engineers the big bucks. Hope the engineer for that
    new
    | >French bridge got the math right!
    |
    | Yeah, really! The photos I've seen look absolutely beautiful.
    |
    | There's a much less challenging bridge in LeHavre that is still
    | gorgeous, as well as breathtaking when you realize how high you will
    | be going on it.

    I wonder if it will be like the Mackinac Bridge in Northern Michigan where
    people just freeze when they have to drive over it. "Each year hundreds of
    drivers suffering from agoraphobia (fear of high places) seek help from
    bridge personnel to drive their vehicles over the bridge for them". Some of
    them hide in the rear with a blanket over their heads!

    NM
     
  9. Agoraphobia is the fear of open spaces, not high places.

    --
    Regards,
    Nicolaas.


    .... The harm we do is more noticed than any good we do.
     
  10. NSM

    NSM Guest

    | <
    | > I wonder if it will be like the Mackinac Bridge in Northern Michigan
    where
    | > people just freeze when they have to drive over it. "Each year hundreds
    of
    | > drivers suffering from agoraphobia (fear of high places) seek help from
    | > bridge personnel to drive their vehicles over the bridge for them". Some
    of
    | > them hide in the rear with a blanket over their heads!
    | >
    | > NM
    |
    | Agoraphobia is the fear of open spaces, not high places.

    It's a quote.
     
  11. Big deal. It is no less wrong because of that.

    --
    Regards,
    Nicolaas.


    .... We often don't appreciate what we have until we lose it. Don't wait
    for that to happen.
     
  12. Jim Adney

    Jim Adney Guest

    Only at the support points. ;-)

    -
     
  13. Jim Adney

    Jim Adney Guest

    But wouldn't a solid rod with the same cross sectional area would do
    the same thing at the same time? After all, nothing will happen until
    the tension/unit area reaches the plastic deformation range.

    -
     
  14. NSM

    NSM Guest

    | Big deal. It is no less wrong because of that.

    PLONK!
     
  15. Thanks ... and up yours with a large pine cone - big end frst.
     
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