Joule Thief 101

[MileHigh]

Lets look at your !big reveal! answers then.
Post 1847.--The wine glass resonates by cycling energy back and forth between two forms, kinetic energy and potential energy.
This part is good.
The instant when the glass is not deformed, the glass is moving at a maximum velocity
This is correct as well
all of the energy is stored as kinetic energy in the form of a moving mass
This is  incorrect,as some of the energy is dissipated while the mass is moving -in simple terms,in way of sound waves.
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
Well i see at this !instant! point in time,you have correctly stated that the glass has stopped moving-!BUT! not all of the kinetic energy is stored as potential energy,but more so the remaining kinetic energy is stored as potential energy. But at this very point the glass stops moving,is the very point when a vibrational wave is created,and so at the point of kinetic to potential energy transformation,a small portion of energy is dissipated as vibrations.
It is also funny how you have used the term!compressed spring!,where a spring has very little stiffness,but a high value of elasticity--something to think about
In between these two states, the energy is stored as combination of kinetic energy and potential energy.
Not all the energy is stored,as some is dissipated-as i explained above.
Almost MH,but you needed to add in the environmental conditions as well--to be accurate,as the wine glass would also have to include the atmosphere that is both inside and around the wine glass as effective moving mass,along with being an effective resistance as well--none of that in space  --but we wont get picky now.
See,now here is where you went from compressed spring to stiffness. The correct term(and this is the scientific term MH)is elasticity of the glass--not stiffness,as when you use the correct term!elasticity!,then the elasticity value has to decrease in order for the resonant frequency to increase,where as your !!stiffness!! has to increase in order for the resonant frequency to increase

These were your answers MH,and you said that all of ours given were wrong,and yours was going to be absolute,and correct.
If you are going to make a claim like this,then you need to be 100% correct-even in a 4 sentence explanation. But as you can see,you were not,and that is fact MH.
If any one of us had of put up answers like that,after dismissing everyone elses,then you would have picked us apart--as you generally do.
So the same applies to you--you were not 100% correct MH,and all that you have provided had been already stated many times in the thread.

Brad

All of your comments about losses are not applicable.  Like I already told you, this is a basic academic approach to understanding what resonance is.  This is analogous to telling to you and others that you can discuss an ideal coil that has no electrical resistance and try to understand how it will function in a circuit.  I think it took you and your peers a couple of years to come around on that one and accept it.  Likewise, this is just a discussion about resonance in a wine glass with the goal of understanding how the resonance actually works, and you don't need to discuss the losses even though you are fully aware that they are there.  Therefore all of your comments about losses are dismissed.  If you are unable to comprehend this, then that is your problem and you have issues.

The same argument above applies to your comments about environmental conditions.

See,now here is where you went from compressed spring to stiffness. The correct term(and this is the scientific term MH)is elasticity of the glass--not stiffness,as when you use the correct term!elasticity!,then the elasticity value has to decrease in order for the resonant frequency to increase,where as your !!stiffness!! has to increase in order for the resonant frequency to increase

See my post to Webby about "stiffness."  The highlighted text in your quote above is an example of your profound words of wisdom.

If you are going to make a claim like this,then you need to be 100% correct-even in a 4 sentence explanation. But as you can see,you were not,and that is fact MH.

In fact my answers to the questions are 100% correct.  You are just doing your usual shtick and making a spectacle of yourself.

Please go ahead and link to what you think is your best answer.  But like I already told you, all your attempts to answer the two questions were wrong, and you were not going to get any hints.  I read every attempt at an answer by everyone and I did it very carefully and nobody answered the two questions successfully.

MileHigh

[MileHigh]

Indeed MH,,

"The stiffness, k, of a body is a measure of the resistance offered by an elastic body to deformation."

The force to deform is only half the answer,, so it is NOT a complete answer,,

Just like your answers to your questions are incomplete.

Remember MH, we are talking about the special condition of resonance,,, NOT just an oscillation.

You have got nothing Webby and you are just irrationally spouting out foolishness.

[MileHigh]

Forget it Webby, you are going nowhere fast.  An oscillating spring is a perfect example of resonance.  Duh...

If you do not have a grasp on these basic parts and concepts of resonance then anything you have to say is useless.

You have got a serious case of Sn-50 contamination in your brain and it is impairing you.  Change your diet.

[poynt99]

Perhaps CH 1 was inverted,or you are looking at the winding directions of the coils in the pic-that may not represent the actual winding direction of the coils,as not dot convention is depicted on the two transformer coils?. Regardless of polarity,it is more associating the rising and falling current value to that of the rising and falling secondaries EMF value. <ost of us here were able to determine that the scope shot was correct-in that it showed that at the point of maximum rate of change in the magnetic field(determined by the current trace at the 0 volt line),we see a maximum EMF amplitude across the secondary coil,and that the phase difference of 90* is correct.

It is definitely CH2 that is inverted, OR your coils are in opposite phase. Anyway, no big deal, but I would encourage you to note these things on your schematics, because as that scope shot was presented, it does not match up with the probes.

While you are here,could you answer a simple question?.
What is needed in order to cause a change in impedance in a transformer,where that transformer has a primary and secondary winding,and is of an air core type ?.

Sure, what is your definition of "impedance" of a transformer?

Let's start with that.

[tinman]

At least I understand resonance.

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

Yes,i mentioned the external force many times,but it seems that an accurate answer to !what is resonance! needs not to include the actual driving force that provides the energy that is to be stored in the oscillating system. MHs answer to what is resonance,has shown us the leaky storage system,but has left out the provider of the energy that is to be stored.

I mean,there are simple terms,and then there is !half! answers.
How are we to get a JT to oscillate at a resonant frequency if we have no input energy?.


Brad