Am 25.03.2022 um 15:15 schrieb Paul B. Andersen:
>
>
> Den 25.03.2022 08:25, skrev Thomas Heger:
>>
>> I'm an engineer
>
> I don't believe you.
>
> No engineer can be so completely ignorant of elementary
> Newtonian mechanics, electrotechnics and maths as you are.
>
I'm not unaware of any of those topics. But there are different branches
in engineering and elctrotechnics was only a little side-topic for me.

I'm a hobbyist in electronics and can do a lot of stuff in this realm.
But to understand the meaning of Maxwell's equations was (unfortunately)
a relatively recent achievement for me.

I was actually quite good in math in school (one of the best in our
school) and won a little price.

But school is long ago and everything got a little 'rusty'.

In university I learned math, too, of course. But that was all quite a
lot in too little time, hence I forgot most.

Another influence was actually chemistry, which I was also interested in
school and a very good student. I had actually my own little laboratory
in the basement. In chemistry I have learned a lot about atoms, orbitals
and things like Schroedingers equation (at the age of 16).

TH

On March 25, Paul B. Andersen wrote:
> No engineer can be so completely ignorant of elementary
> Newtonian mechanics, electrotechnics and maths as you are.

Ingenuity is possible sans math and book learning -

https://youtu.be/HZJAzkLyWG4

--
Rich

On 3/25/2022 3:16 AM, Thomas Heger wrote:
> Am 25.03.2022 um 05:31 schrieb Michael Moroney:
>> On 3/23/2022 4:36 AM, Thomas Heger wrote:
>>> Am 22.03.2022 um 22:31 schrieb Michael Moroney:
>>>> On 3/22/2022 4:11 AM, Thomas Heger wrote:
>>>>> Am 15.03.2022 um 19:19 schrieb Michael Moroney:
>>>>>> On 3/15/2022 3:17 AM, Thomas Heger wrote:
>>>>>>> Am 14.03.2022 um 17:27 schrieb Michael Moroney:
>>>>>>>> Not a problem.
>>>>>>>>
>>>>>>>> 1) The electron could be flying along in a straight line when at
>>>>>>>> t=0,
>>>>>>>> the (electro)magnetic field is switched on.
>>>>>>>
>>>>>>> ??????
>>>>>>>
>>>>>>> That IS a VERY serious problem, because VERY large magnets (like
>>>>>>> in a
>>>>>>> synchroton), can take quite a while to build up a static magnetic
>>>>>>> field.
>>>>>>>
>>>>>>>
>>>>>> And what does this have to do with the price of tea in China?
>>>>>
>>>>>
>>>>> It has something to do with your comment, that the magnet could be
>>>>> switched on, once the electron enters at t=0.
>>>>>
>>>>> I wanted to mention, that this is not possible, because a sharp
>>>>> steplike increase of the magnetic field strength in a magnet is
>>>>> impossible.
>>>>
>>>> And...?
>>>>
>>>> There are no electromagnets with a perfect step function response.
>>>
>>> But YOU wanted to switch the magnet one in that moment, when the
>>> electron passes by.
>>
>> No, YOU were whining that the electron wasn't going in a straight line
>> before it was measured. Despite the irrelevance of that, you kept
>> whining about it, so I offered that as a solution.  Instead, you found
>> *another* thing to whine about.
>
>
> I wrote my annotations from the perspective of a hypothetical professor,
> who treated the text in question as the homework of a student.

A *real* professor, on the other hand, wouldn't bother questioning
things that may be difficult or impossible to actually do with a problem
like that. As is evident in so many mechanics problems assuming
frictionless surfaces or air resistance.

> Now my aim was, to find every single error, whether important or not,
> even if it is a very small error.

A real professor doesn't consider such simplifications as an error.

> I also gave him the advise, to try something else than theoretical physics.

Your retarded hypothetical "professor" really is dumb.

Am 26.03.2022 um 20:43 schrieb Michael Moroney:
> On 3/25/2022 3:16 AM, Thomas Heger wrote:
>> Am 25.03.2022 um 05:31 schrieb Michael Moroney:
>>> On 3/23/2022 4:36 AM, Thomas Heger wrote:
>>>> Am 22.03.2022 um 22:31 schrieb Michael Moroney:
>>>>> On 3/22/2022 4:11 AM, Thomas Heger wrote:
>>>>>> Am 15.03.2022 um 19:19 schrieb Michael Moroney:
>>>>>>> On 3/15/2022 3:17 AM, Thomas Heger wrote:
>>>>>>>> Am 14.03.2022 um 17:27 schrieb Michael Moroney:
>>>>>>>>> Not a problem.
>>>>>>>>>
>>>>>>>>> 1) The electron could be flying along in a straight line when at
>>>>>>>>> t=0,
>>>>>>>>> the (electro)magnetic field is switched on.
>>>>>>>>
>>>>>>>> ??????
>>>>>>>>
>>>>>>>> That IS a VERY serious problem, because VERY large magnets (like
>>>>>>>> in a
>>>>>>>> synchroton), can take quite a while to build up a static magnetic
>>>>>>>> field.
>>>>>>>>
>>>>>>>>
>>>>>>> And what does this have to do with the price of tea in China?
>>>>>>
>>>>>>
>>>>>> It has something to do with your comment, that the magnet could be
>>>>>> switched on, once the electron enters at t=0.
>>>>>>
>>>>>> I wanted to mention, that this is not possible, because a sharp
>>>>>> steplike increase of the magnetic field strength in a magnet is
>>>>>> impossible.
>>>>>
>>>>> And...?
>>>>>
>>>>> There are no electromagnets with a perfect step function response.
>>>>
>>>> But YOU wanted to switch the magnet one in that moment, when the
>>>> electron passes by.
>>>
>>> No, YOU were whining that the electron wasn't going in a straight line
>>> before it was measured. Despite the irrelevance of that, you kept
>>> whining about it, so I offered that as a solution. Instead, you found
>>> *another* thing to whine about.
>>
>>
>> I wrote my annotations from the perspective of a hypothetical
>> professor, who treated the text in question as the homework of a student.
>
> A *real* professor, on the other hand, wouldn't bother questioning
> things that may be difficult or impossible to actually do with a problem
> like that. As is evident in so many mechanics problems assuming
> frictionless surfaces or air resistance.

Sure, but still you missed the point, because it was not my aim to
immitate a real professor.

I pretended to be a professor, what is more like in a role play.

It is actually like this: if you would dress like superman, you
certainly won't try to fly.

....

TH

Den 27.03.2022 19:40, skrev Thomas Heger:

>
> I pretended to be a professor, what is more like in a role play.
>
> It is actually like this: if you would dress like superman, you
> certainly won't try to fly.
>
So you know how stupid your 'role play' is, but still do it?

--
Paul

https://paulba.no/

On 2022-02-12 19:18:55 +0000, Thomas Heger said:

> after spending a lot of time on the subject and after rewriting most of
> my comments (at least a little), I would call my latest version now
> 'final'.
>
> The text 'On the Electrodynamics of Moving Bodies' as a pdf with my
> comments can be found here
>
> https://drive.google.com/file/d/1IiF0r7Rl4eLEMLOyRorKke6iDwFpWvxl/view?usp=sharing
>

All your comments show something about you. Perhaps you should reconsider
how much of you you want to show in a public place.

Mikko

Thomas Heger <ttt_heg@web.de> wrote:
> Am 26.03.2022 um 20:43 schrieb Michael Moroney:
>> On 3/25/2022 3:16 AM, Thomas Heger wrote:
>>> Am 25.03.2022 um 05:31 schrieb Michael Moroney:
>>>> On 3/23/2022 4:36 AM, Thomas Heger wrote:
>>>>> Am 22.03.2022 um 22:31 schrieb Michael Moroney:
>>>>>> On 3/22/2022 4:11 AM, Thomas Heger wrote:
>>>>>>> Am 15.03.2022 um 19:19 schrieb Michael Moroney:
>>>>>>>> On 3/15/2022 3:17 AM, Thomas Heger wrote:
>>>>>>>>> Am 14.03.2022 um 17:27 schrieb Michael Moroney:
>>>>>>>>>> Not a problem.
>>>>>>>>>>
>>>>>>>>>> 1) The electron could be flying along in a straight line when at
>>>>>>>>>> t=0,
>>>>>>>>>> the (electro)magnetic field is switched on.
>>>>>>>>>
>>>>>>>>> ??????
>>>>>>>>>
>>>>>>>>> That IS a VERY serious problem, because VERY large magnets (like
>>>>>>>>> in a
>>>>>>>>> synchroton), can take quite a while to build up a static magnetic
>>>>>>>>> field.
>>>>>>>>>
>>>>>>>>>
>>>>>>>> And what does this have to do with the price of tea in China?
>>>>>>>
>>>>>>>
>>>>>>> It has something to do with your comment, that the magnet could be
>>>>>>> switched on, once the electron enters at t=0.
>>>>>>>
>>>>>>> I wanted to mention, that this is not possible, because a sharp
>>>>>>> steplike increase of the magnetic field strength in a magnet is
>>>>>>> impossible.
>>>>>>
>>>>>> And...?
>>>>>>
>>>>>> There are no electromagnets with a perfect step function response.
>>>>>
>>>>> But YOU wanted to switch the magnet one in that moment, when the
>>>>> electron passes by.
>>>>
>>>> No, YOU were whining that the electron wasn't going in a straight line
>>>> before it was measured. Despite the irrelevance of that, you kept
>>>> whining about it, so I offered that as a solution. Instead, you found
>>>> *another* thing to whine about.
>>>
>>>
>>> I wrote my annotations from the perspective of a hypothetical
>>> professor, who treated the text in question as the homework of a student.
>>
>> A *real* professor, on the other hand, wouldn't bother questioning
>> things that may be difficult or impossible to actually do with a problem
>> like that. As is evident in so many mechanics problems assuming
>> frictionless surfaces or air resistance.
>
> Sure, but still you missed the point, because it was not my aim to
> immitate a real professor.
>
> I pretended to be a professor, what is more like in a role play.
>
> It is actually like this: if you would dress like superman, you
> certainly won't try to fly.

And if you dress up like a professor, then you’re certainly not going to
find any real mistakes.

>
> ...
>
>
> TH
>

--
Odd Bodkin -- maker of fine toys, tools, tables

Am 28.03.2022 um 15:09 schrieb Odd Bodkin:

>>>> I wrote my annotations from the perspective of a hypothetical
>>>> professor, who treated the text in question as the homework of a student.
>>>
>>> A *real* professor, on the other hand, wouldn't bother questioning
>>> things that may be difficult or impossible to actually do with a problem
>>> like that. As is evident in so many mechanics problems assuming
>>> frictionless surfaces or air resistance.
>>
>> Sure, but still you missed the point, because it was not my aim to
>> immitate a real professor.
>>
>> I pretended to be a professor, what is more like in a role play.
>>
>> It is actually like this: if you would dress like superman, you
>> certainly won't try to fly.
>
> And if you dress up like a professor, then you’re certainly not going to
> find any real mistakes.

Of course I don't 'dress up like a professor', nor do I pretend to be one.

It is a ficticious background, like in a role play.

The role I play is that of a professor, who had to write corrections for
the homework of a student.

But a specific dress is not required.

The errors I find are all real, at least I meant my comments are about
real errors.

The method is actually a tool for self-education and works quite good,
while you apparently do not understand, how that method works.

The number of errors I found was just enormous, what came as a surprise
for me. But that's a different story.

TH