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Re: New rewritten version of 'annotated version of SRT'

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  Re: New rewritten version of 'annotated version of SRT' Thomas Heger <ttt_heg@web.de> - 2022-03-27 19:40 +0200
    Re: New rewritten version of 'annotated version of SRT' "Paul B. Andersen" <paul.b.andersen@paulba.no> - 2022-03-28 10:07 +0200
    Re: New rewritten version of 'annotated version of SRT' Odd Bodkin <bodkinodd@gmail.com> - 2022-03-28 13:09 +0000
      Re: New rewritten version of 'annotated version of SRT' Thomas Heger <ttt_heg@web.de> - 2022-06-02 08:51 +0200

#581109 — Re: New rewritten version of 'annotated version of SRT'

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

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#581161

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/

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#581170

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

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#586290

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

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