Re: [math-fun] Sonic screwdrivers for dentists?
On 2016-08-05 07:29, James Propp wrote:
Is it possible to design materials so that they'll fall apart (or change state in other useful ways) when stimulated by vibrations of a particular frequency?
I just had a temporary crown put on one of my teeth. The dentist used a weak adhesive (so that he'd be able to remove it a couple of weeks from now when the real crown is available), and the crown just broke (I'm guessing that the weak adhesive that he used was at least as much a factor as the scone I crunched).
No, scones are hazardous! A few weeks ago I snapped an undecayed (but partially restored) bicuspid on a scone made by NeilB's mother! --rwg
Could there be a stronger adhesive that loses its adhesive virtue when you make it vibrate it just so? (Might dentists if the future say "Don't sing any loud B-flats for the next two weeks"?)
Jim Propp
What about quick clay? --rwg On Fri, Aug 5, 2016 at 7:32 PM, Bill Gosper <billgosper@gmail.com> wrote:
On 2016-08-05 07:29, James Propp wrote:
Is it possible to design materials so that they'll fall apart (or change state in other useful ways) when stimulated by vibrations of a particular frequency?
I just had a temporary crown put on one of my teeth. The dentist used a weak adhesive (so that he'd be able to remove it a couple of weeks from now when the real crown is available), and the crown just broke (I'm guessing that the weak adhesive that he used was at least as much a factor as the scone I crunched).
<Surgeon General's scone warning>
Could there be a stronger adhesive that loses its adhesive virtue when
you
make it vibrate it just so? (Might dentists if the future say "Don't sing any loud B-flats for the next two weeks"?)
Jim Propp
I keep thinking "potty putty" (maybe haven't been paying proper attention). WFL On 8/6/16, Bill Gosper <billgosper@gmail.com> wrote:
What about quick clay? --rwg
On Fri, Aug 5, 2016 at 7:32 PM, Bill Gosper <billgosper@gmail.com> wrote:
On 2016-08-05 07:29, James Propp wrote:
Is it possible to design materials so that they'll fall apart (or change state in other useful ways) when stimulated by vibrations of a particular frequency?
I just had a temporary crown put on one of my teeth. The dentist used a weak adhesive (so that he'd be able to remove it a couple of weeks from now when the real crown is available), and the crown just broke (I'm guessing that the weak adhesive that he used was at least as much a factor as the scone I crunched).
<Surgeon General's scone warning>
Could there be a stronger adhesive that loses its adhesive virtue when
you
make it vibrate it just so? (Might dentists if the future say "Don't sing any loud B-flats for the next two weeks"?)
Jim Propp
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Fred Lunnon