Joule Thief 101

[SeaMonkey]

Wine Glass Questions - Answered

How does a wine glass resonate, what is the mechanism?

The wine glass resonates by cycling energy back and forth between two forms, kinetic energy and potential energy.  The instant when the glass is not deformed, the glass is moving at a maximum velocity and all of the energy is stored as kinetic energy in the form of a moving mass.  The instant when the glass is at its maximum deformation, the glass has stopped moving and all of the energy is stored as potential energy in the form of a compressed spring.  In between these two states, the energy is stored as combination of kinetic energy and potential energy.

How is the resonant frequency of a wine glass determined?

The resonant frequency of a wine glass is determined by a combination of the effective moving mass of the glass and the effective stiffness of the glass interacting with each other.  The higher the effective moving mass of the glass, the lower the resonant frequency.  The higher the effective stiffness the glass, the higher the resonant frequency.

In Other Words:  Rap the glass and it twangs at its natural
resonant frequency.  If that tone isn't satisfactory, partially
fill the glass with wine and rap it again.

Repeat as necessary.

Drink the wine following each trial.

[ramset]

No
that was just the first Part [It Must be??}

Miles will Now "strut around like A primordial Peacock" and if he can keep from Dragging his Knuckles on the sidewalk ...  he will  show how this "BIG REVEAL " will drastically alter Brads MO for working with resonance .

or the 100 other methods shared here "PRIOR" to this "BIG REVEAL"....

Miles please tell Us that wasn't the "Money Shot".......



Truly the Point of your "Big Reveal" was to teach something worthy of all this Drama ??
a goal beyond semantics ??

a Bold New Path .....the Honing of the Tool .....?

Bigger... better....stronger ??

Please ??

[hoptoad]

If you have been following along I stated that I will not give any clues to lead people to the correct answer.  It's a no-spoon-feeding zone.  You either get it right or you don't.  I also said that if nobody gets it I will provide the answers next week.

Over the years I have provide a ton of informative explanations so you should take back your words because they are a lie.

Over the years you have provided a lot of words, and occasionally a few pictures or drawings to go along with them. Whether those words and pics can be considered informative explanations or not is purely subjective opinion.
Cheers

[shylo]

Tinman, I agree the approaching magnet will give rise, but only to the peak of the positive, at TDC that positive peak then reverses instantly to negative peak ,and as the magnet leaves the negative peak rises back to the zero line.??
Why would the decline of the + peak and the propagation of the negative peak take twice as long when only at TDC?
The only way I can see your sine wave is if the core of the coil is twice as wide as the magnet. This would give time for decline of the positive and the rise of the negative.
Not trying to start an argument  just trying to understand.
artv

[tinman]

Wine Glass Questions - Answered







  The higher the effective moving mass of the glass, the lower the resonant frequency.  The higher the effective stiffness the glass, the higher the resonant frequency.

How does a wine glass resonate, what is the mechanism?--The wine glass resonates by cycling energy back and forth between two forms, kinetic energy and potential energy.

Er-no.
The wine glass will not resonate at all unless it receive's energy from another source.

 

The instant when the glass is not deformed, the glass is moving at a maximum velocity and all of the energy is stored as kinetic energy in the form of a moving mass.

Er-wrong again.
Some of the energy is dissipated as compression waves--  sound waves MH.

The instant when the glass is at its maximum deformation,

Already included this bit in one of my explanations--which of course you said was wrong.
Quote post 1696-It resonates due to the deformation and reformation  of the wine glass from it's rest shape,

the glass has stopped moving and all of the energy is stored as potential energy in the form of a compressed spring.  In between these two states, the energy is stored as combination of kinetic energy and potential energy.

Nope-im afraid not. Some of the energy is dissipated as compression waves(sound waves),and some is dissipated as vibration through the table or platform the wine glass is sitting on.

How is the resonant frequency of a wine glass determined?
The resonant frequency of a wine glass is determined by a combination of the effective moving mass of the glass and the effective stiffness of the glass interacting with each other.

So you say the resonant frequency is determined by-effective moving mass,and stiffness of the glass.To you this is correct.
I say (post 1696)-The resonant frequency of a wine glass is determined by the shape,size,and structure of the glass,where you effective moving mass !is! the shape and size,and your !stiffness! is determined by the structure of the glass/crystal that the wine glass is made from;

Lol
MH-you really are a comedian some time's

It was a good laugh-if nothing else.


Brad