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Re: [Phys-L] This Week's "Charming" CarTalk Puzzler



Talking of scuba tanks reminds that this "Increased pressure squeezes the balloon" is not the very best explanation.How about using a sealed aluminum air cylinder weighted to just sit on the floor of the water container?
If the water is compressed, the aluminum cylinder will start upwards.The essence of the puzzle is the relative bulk moduli of the two components: aluminum's bulk modulus is 70 GPa, while that of water is a mere 2.1 GPa
On Thursday, October 13, 2022 at 11:25:34 AM CDT, Dan Macisaac via Phys-l <phys-l@mail.phys-l.org> wrote:

Voids and air bubbles not kids


  Dr. Dan MacIsaac, AAPT Fellow & Professor of Physics
  Adjunct Professor of Earth Sciences and Science Education
  SUNY-Buffalo State College, SAMC278, 1300 Elmwood Ave, Buffalo
  NY 14222  <macisadl@buffalostate.edu>


On Oct 13, 2022, at 12:23, Dan Macisaac <danmacisaac@gmail.com> wrote:

A classic issue for real life scuba divers controlling their buoyancy actually. Both the Buoyancy Control Device bladders and kids in a wetsuit neoprene compress. For added fun the tank gets lighter as you use the air.


    Dr. Dan MacIsaac, AAPT Fellow & Professor of Physics
    Adjunct Professor of Earth Sciences and Science Education
    SUNY-Buffalo State College, SAMC278, 1300 Elmwood Ave, Buffalo
    NY 14222  <macisadl@buffalostate.edu>


On Oct 13, 2022, at 12:11, John Denker via Phys-l <phys-l@mail.phys-l.org> wrote:

See also:

https://en.wikipedia.org/wiki/Cartesian_diver
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