Lessons In Physics

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Offline DoctorBeaver

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« Reply #50 on: 06/01/2009 17:11:52 »
*Lifts hand up like a nice child to ask a question* [;D]

How polite you Koreans are! We Brits would just say "Oi, I wanna ask ya a question Moosh" [;D]
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Offline Mr. Scientist

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« Reply #51 on: 06/01/2009 17:12:20 »
How can i say ''no'' to that?
http://www.youtube.com/watch?v=SZGcNx8nV8U

''God could not have had much time on His hands when he formed the Planck Lengths.''

 ̿ ̿ ̿ ̿̿'\̵͇̿̿\=(●̪)=/̵͇̿̿/'̿'̿̿̿ ̿ ̿̿ ̿ ̿

٩๏̯͡๏۶

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Offline Seany

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« Reply #52 on: 06/01/2009 17:15:20 »
How can i say ''no'' to that?

Thank you for being so considerate [;)]
They say that when you die, your life flashes in front of you. Make it worth watching!


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Offline Seany

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« Reply #53 on: 06/01/2009 17:15:46 »
*Lifts hand up like a nice child to ask a question* [;D]

How polite you Koreans are! We Brits would just say "Oi, I wanna ask ya a question Moosh" [;D]

How nice of you to still remember my nationality [;D]
Good memory!
They say that when you die, your life flashes in front of you. Make it worth watching!


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Offline Madidus_Scientia

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« Reply #54 on: 06/01/2009 17:23:25 »
Quote
Criticism is fine, as i once said. But being ignorant towrds someone without proof is bad in itself.

The people who have criticised you have shown the opposite of ignorance, they have exercised critical thinking skills and have questioned your logic. If they were ignorant, they would have blindly taken what you said to be truth. You are the one being ignorant toward those who question you.


well, that's interesting, because I see it completely differently. As i said, there is criticism, and then there is just ignorance, and in this case, the ignorance was directed to impune my work, and me.

I can take criticism, but not if it has behind it bad intentions.

Where are the bad intentions?

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Offline Mr. Scientist

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« Reply #55 on: 06/01/2009 17:31:46 »
Where are the good intentions in saying there is something potentially wrong in my taking work i have already written for the good of people learning?

Just drop it.
http://www.youtube.com/watch?v=SZGcNx8nV8U

''God could not have had much time on His hands when he formed the Planck Lengths.''

 ̿ ̿ ̿ ̿̿'\̵͇̿̿\=(●̪)=/̵͇̿̿/'̿'̿̿̿ ̿ ̿̿ ̿ ̿

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Offline DoctorBeaver

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« Reply #56 on: 06/01/2009 17:45:51 »
*Lifts hand up like a nice child to ask a question* [;D]

How polite you Koreans are! We Brits would just say "Oi, I wanna ask ya a question Moosh" [;D]

How nice of you to still remember my nationality [;D]
Good memory!

I've made a Korea out of remembering things  [;D]
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Offline yor_on

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« Reply #57 on: 06/01/2009 17:58:45 »
Mr S.
Relax, but prepare for questions and opinions:)
But that is as it should be...

After all, we all want it to be as 'right' as possible.
And nobody here is evil..

Ah, with the possible exception of that person in red over there, perhaps?
You know, the one with those two red pointy things.
what are they called?
Horns?

:)

Nah, relax and enjoy.
Some may expect a more stringent 'language' when describing an idea.

But when done as I do :)
They fast realize that the best they ever will get out of me is a..
'I know Noothing, noo thiing I say'.

Yep, brothers in arms, that's us, Manuel and me.
"BOMB DISPOSAL EXPERT. If you see me running, try to keep up."

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Offline Mr. Scientist

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« Reply #58 on: 06/01/2009 18:03:34 »
Yes, i will relax. I also don't mind questions, but i don't want my teaching method questioned, because afterall, i don't see anyone else jumping to the opportunity to take time out of their day to go through, and to be honest, a very difficult area of science.
http://www.youtube.com/watch?v=SZGcNx8nV8U

''God could not have had much time on His hands when he formed the Planck Lengths.''

 ̿ ̿ ̿ ̿̿'\̵͇̿̿\=(●̪)=/̵͇̿̿/'̿'̿̿̿ ̿ ̿̿ ̿ ̿

٩๏̯͡๏۶

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Offline yor_on

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« Reply #59 on: 06/01/2009 19:28:00 »
But they do Mr. S :)

In a 'laid back' manner perhaps.
But one of the main reasons, beyond the civility and knowledge shown around here, I enjoy this place is just that.
That here you will find people taking that 'extra step' to try to explain their thoughts in a comprehensible manner.
Lightarrow is my most recent example of a guy showing extraordinary patience with me, guiding me in how physics define and differ between different concepts.
What you are planning to do is the same :) but as a more concise 'treatise' relating to defined areas.

But in the end, I believe, it all comes down to our need to learn.

The more you use that mind the more you will find that you don't know anything.
At least that is how it feels for me :)
Then , on the other tentacle, in my case it might be all too true::))

When you find that you suddenly understand something, that you had problems coming to grip with before.
That's the best kick there are.

Yep, Knowledge should be free, and here I think it is.
(Although it may cost one some 'sweat' coming to 'terms' with it, ah, that new knowledge i meant:)
« Last Edit: 06/01/2009 22:25:34 by yor_on »
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Offline Mr. Scientist

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« Reply #60 on: 06/01/2009 19:32:58 »
Forgive me, i meant lessons, not participatory means, which people here do take their time out of to do.
http://www.youtube.com/watch?v=SZGcNx8nV8U

''God could not have had much time on His hands when he formed the Planck Lengths.''

 ̿ ̿ ̿ ̿̿'\̵͇̿̿\=(●̪)=/̵͇̿̿/'̿'̿̿̿ ̿ ̿̿ ̿ ̿

٩๏̯͡๏۶

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Offline Soul Surfer

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« Reply #61 on: 06/01/2009 19:44:15 »
I have no criticism of good explanations containing accurate examples at an understandable level for the questioner and work hard to do this when asked.  Can I point out though that on both of the two sites where I found identical postings to what Mr Scientist posted here containing identical errors the (differently named) posters had been banned from the site, presumably for posting poor quality scientific information.  Also I have been active as a moderator on open chat sites of many different types ever since the web was invented and Mr Scientist's aggression, fear of criticism and pleading as a victim are totally characteristic of the behaviour of that loathsome species the internet Troll.

Mr Scientist there is still time to mend your ways with this site if you concentrate on polite and accurate scientific discussion you might even learn some science.  But for someone who apparently does not understand (or pretends not to understand) how a filament light bulb works.  (see      )  offering to teach others seems a bit unwise.

Mind you it is amazing the poor quality teaching that exists in some schools these days because it was only a couple of years ago that we had a young person on this site who had been told that the electrons round the nucleus of atoms atoms were held together by gravity like planetary systems.  Fortunately I think we did manage to get a message back to the teacher.
Learn, create, test and tell
evolution rules in all things
God says so!

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Offline Mr. Scientist

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« Reply #62 on: 06/01/2009 19:49:34 »
You base this on a bulb?

This is not about my knowledge on the workings of a bulb. Check my more recent posts that are short lesson installations. If you find error with me, i will admit a mistake, but i will not be a ''victim'' as you put it to shallow attacks on my teaching method, never mind its truthfullness. If i was teaching people how a bulb worked, i would understand your analogy, but i am not teaching that.

http://www.youtube.com/watch?v=SZGcNx8nV8U

''God could not have had much time on His hands when he formed the Planck Lengths.''

 ̿ ̿ ̿ ̿̿'\̵͇̿̿\=(●̪)=/̵͇̿̿/'̿'̿̿̿ ̿ ̿̿ ̿ ̿

٩๏̯͡๏۶

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Offline Soul Surfer

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« Reply #63 on: 06/01/2009 20:03:01 »
can you please explain to me what you mean by the statement

"Take a dice. A dice has about 10^80 grams of energy!"

 
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Offline syhprum

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« Reply #64 on: 06/01/2009 20:37:22 »
Soulsurfer

When I was at school in 1941 not only were we taught that Electron orbited the nucleus like little planets but that the nucleus consisted of Protons and Electrons.
Perhaps Neutrons were a military secret in 1941 !
« Last Edit: 06/01/2009 20:40:34 by syhprum »
syhprum

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Offline Soul Surfer

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« Reply #65 on: 06/01/2009 20:48:42 »
Early  theories of atomic structure did not recognise neutrons.  These were first described as separate particles by Chadwick I think (must look this up)

The way it was described was like this.   It was known that protons congregated in the centre of the atom but it was not known how they bound together.  It was known that a certain number of electrons were in shells around the nucleus and these defined the chemical properties of the atom.  The atomic weight of elements showed that there was an excess of heavy particles over the atomic number in higher atomic weight nuclei so it was assumed that they were protons and electrons bound together in a different way to hold the nucleus together against the powerful repulsive forces of the positively charged protons.  these electrons were described for a few years as nuclear electrons.

OK this was eventually shown to be wrong but it was the best Idea that they had at the time.


Neutrons were first and observed made by bombarding a beryllium target with alpha particles(helium nuclei)
 from polonium  first observed by the curies but researched and explained by chadwick

"Chadwick immediately repeated the experiments at the Cavendish Laboratory in Cambridge, England. He not only bombarded the hydrogen atoms in paraffin with the beryllium emissions, but also used helium, nitrogen, and other elements as targets. By comparing the energies of recoiling charged particles from different targets, he proved that the beryllium emissions contained a neutral component with a mass approximately equal to that of the proton. He called it the neutron in a paper published in the February 17, 1932, issue of Nature. In 1935, Sir James Chadwick received the Nobel Prize in physics for this work"

extract from http://www.chemcases.com/nuclear/nc-01.htm

So your teachers were about ten years behind  (about typical I would think)  In the later forties and early 50s when I was at junior school I read about nuclear structure involving neutrons and had diagrams of a simple two sub critical mass fission bomb and a nuclear reactor in books I could read from the library.
« Last Edit: 06/01/2009 21:05:41 by Soul Surfer »
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God says so!

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Offline Mr. Scientist

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« Reply #66 on: 06/01/2009 21:36:00 »
can you please explain to me what you mean by the statement

"Take a dice. A dice has about 10^80 grams of energy!"

 

What don't you understand about it?
http://www.youtube.com/watch?v=SZGcNx8nV8U

''God could not have had much time on His hands when he formed the Planck Lengths.''

 ̿ ̿ ̿ ̿̿'\̵͇̿̿\=(●̪)=/̵͇̿̿/'̿'̿̿̿ ̿ ̿̿ ̿ ̿

٩๏̯͡๏۶

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Offline DoctorBeaver

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« Reply #67 on: 06/01/2009 22:03:06 »
When I was a lecturer I listened to all criticisms of my teaching methods. I changed my teaching style a couple of times as a result and when my first batch of students took their degrees most of them thanked me. Incidentally, they got a very high pass rate with most getting a 2.2 or better.

If someone is not prepared to listen to criticism it means they think they are perfect at what they do. I don't believe anyone is.
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Offline Bikerman

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« Reply #68 on: 06/01/2009 22:34:47 »
Doc is correct. I've been a lecturer and teacher for many years. If you can't take criticism of your teaching method then don't teach...it is really as simple as that.

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Offline Mr. Scientist

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« Reply #69 on: 06/01/2009 22:56:51 »
I simply won't answer the criticism. Hopefully people are wise enough to decide opinions of their own without anyones influence.
http://www.youtube.com/watch?v=SZGcNx8nV8U

''God could not have had much time on His hands when he formed the Planck Lengths.''

 ̿ ̿ ̿ ̿̿'\̵͇̿̿\=(●̪)=/̵͇̿̿/'̿'̿̿̿ ̿ ̿̿ ̿ ̿

٩๏̯͡๏۶

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Offline Chemistry4me

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« Reply #70 on: 06/01/2009 22:58:40 »
Does that mean you're not leaving?  [:)] [???]

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Offline Mr. Scientist

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« Reply #71 on: 06/01/2009 23:05:26 »
Someone asked very nicely, so i said i would.
http://www.youtube.com/watch?v=SZGcNx8nV8U

''God could not have had much time on His hands when he formed the Planck Lengths.''

 ̿ ̿ ̿ ̿̿'\̵͇̿̿\=(●̪)=/̵͇̿̿/'̿'̿̿̿ ̿ ̿̿ ̿ ̿

٩๏̯͡๏۶

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Offline Soul Surfer

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« Reply #72 on: 07/01/2009 00:35:57 »
"Take a dice. A dice has about 10^80 grams of energy!"


Everything is wrong with it! the statement is completely obscure and meanigless in scientific terms

Firstly energy is not measured in grams

secondly 10^80 is a very big number indeed

Finally precisely how are they related to a dice  (strictly the term for one is a die dice is a plural) but how big and heavy is it? it is not something that has a standard size,

As you claim to have written this statement you must be able to explain it in rather more extended and unambiguous terms.
« Last Edit: 07/01/2009 00:42:12 by Soul Surfer »
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Offline Madidus_Scientia

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« Reply #73 on: 07/01/2009 06:15:28 »
Quote
secondly 10^80 is a very big number indeed

Yeah even if he meant joules not grams its still wrong, if you estimate a die to be about 8 grams it would have 7.19 * 10^14 joules of energy

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Offline Andrew K Fletcher

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« Reply #74 on: 07/01/2009 08:49:53 »
Now that's painful
Quote

I've made a Korea out of remembering things  [;D]
Science is continually evolving. Nothing is set in stone. Question everything and everyone. Always consider vested interests as a reason for miss-direction. But most of all explore and find answers that you are comfortable with

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Offline DoctorBeaver

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« Reply #75 on: 07/01/2009 09:52:54 »
Hopefully people are wise enough to decide opinions of their own without anyones influence.

Absolutely; and they have the right to make their opinions public.
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Offline DoctorBeaver

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« Reply #76 on: 07/01/2009 09:53:38 »
Now that's painful
Quote

I've made a Korea out of remembering things  [;D]

Yes, I remembered. I didn't have to Czech.
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Offline dentstudent

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« Reply #77 on: 07/01/2009 09:55:07 »
Now that's painful
Quote

I've made a Korea out of remembering things  [;D]

Yes, I remembered. I didn't have to Czech.

Have you quite Finnished?

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Offline Chemistry4me

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« Reply #78 on: 07/01/2009 09:59:46 »
Now that's painful
Quote

I've made a Korea out of remembering things  [;D]

Yes, I remembered. I didn't have to Czech.

Have you quite Finnished?

Who's Hungary for some Turkey?  [;D]

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Offline Chemistry4me

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« Reply #79 on: 07/01/2009 10:04:13 »
Or an Afghan cookie? 

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Offline Madidus_Scientia

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« Reply #80 on: 07/01/2009 10:19:52 »
Maybe some kiwi.

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Offline Chemistry4me

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« Reply #81 on: 07/01/2009 10:31:48 »
Alright, take a Chile pill  [:D] [;D]

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Offline dentstudent

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« Reply #82 on: 07/01/2009 10:32:54 »
Don't go Russian in though.

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Offline dentstudent

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« Reply #83 on: 07/01/2009 10:34:47 »
I'm Ghana assess our United States and Peru-se the outcome.

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Offline Chemistry4me

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« Reply #84 on: 07/01/2009 10:35:37 »
 [:D] [:D] [:D] [:D] [:D] [:D]

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Offline Chemistry4me

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« Reply #85 on: 07/01/2009 10:37:21 »
Don't go Russian in though.
But do go Waleing in.

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Offline Chemistry4me

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« Reply #86 on: 07/01/2009 10:43:58 »
Ken-ya imagine that?

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Offline Chemistry4me

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« Reply #87 on: 07/01/2009 11:31:47 »
Come on! I-ran all this way and nobody has posted anything?  [:D]

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Offline Andrew K Fletcher

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« Reply #88 on: 07/01/2009 13:00:58 »
Thought this was a lesson in physics not geography?
Science is continually evolving. Nothing is set in stone. Question everything and everyone. Always consider vested interests as a reason for miss-direction. But most of all explore and find answers that you are comfortable with

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Offline Madidus_Scientia

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« Reply #89 on: 07/01/2009 13:15:13 »
Come on! I-ran all this way and nobody has posted anything?  [:D]

You must be hot. I'll get you a Cuba ice.

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Offline Seany

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« Reply #90 on: 07/01/2009 14:11:56 »
Someone asked very nicely, so i said i would.


YAYYY! Was this me? [;D]
They say that when you die, your life flashes in front of you. Make it worth watching!


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Offline science_guy

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« Reply #91 on: 07/01/2009 16:30:48 »
there's norway you could possibly come up with more country puns...   [:-\] [:o)] [:o)]
_________________________________________________________________________________________

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he's back!!!!

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Offline Madidus_Scientia

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« Reply #92 on: 07/01/2009 17:34:05 »
On the subject of physics lessons, something you might not know is some universities post certain lectures on youtube, here's a playlist I recommend;

http://www.youtube.com/view_play_list?p=095393D5B42B2266

If learning science is the kind of thing that glues you to your seat then these will provide many hours of seat-glue. Get 'em india!

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Offline Andrew K Fletcher

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« Reply #93 on: 07/01/2009 18:22:03 »
Thanks for the list, will have a look.
On the subject of physics lessons, something you might not know is some universities post certain lectures on youtube, here's a playlist I recommend;

http://www.youtube.com/view_play_list?p=095393D5B42B2266

If learning science is the kind of thing that glues you to your seat then these will provide many hours of seat-glue. Get 'em india!
Science is continually evolving. Nothing is set in stone. Question everything and everyone. Always consider vested interests as a reason for miss-direction. But most of all explore and find answers that you are comfortable with

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Offline Chemistry4me

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« Reply #94 on: 07/01/2009 23:39:08 »
there's norway you could possibly come up with more country puns...   [:-\] [:o)] [:o)]

Are U-kraine-zy of course I can! Aren't U-ganda try?

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Offline lightarrow

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« Reply #95 on: 08/01/2009 12:45:19 »
Walter Lewin's FREE VIDEO lessons of Physics at MIT are the best I've found till now. Unfortunately for me, it's stuff I've already studied at uni. If he taught quantum physics, or general relativity or something I haven't studied, I would immediately watch them.
http://www.youtube.com/watch?v=3omwHv3Cmog&feature=related
With google, look for all his lessons (from mechanics to thermodynamics, optics,ecc.)
« Last Edit: 08/01/2009 12:48:13 by lightarrow »

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Offline yor_on

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Lessons In Physics
« Reply #96 on: 08/01/2009 15:25:46 »
Ahh Lightarrow:)
He's good.

He informed me who it was who started all that 'stupidity' of electricity's wandering from plus to minus.
I found out about it when I was young, and it gave me a hard time accepting the way electricity and electrical drawings were depicted .

Benjamin was his first name right? Sadly i missed his last.
But, I believe i have enough on him now to inform the proper authorities.

He will be apprehended and brought to justice..
And that's a promise...
"BOMB DISPOSAL EXPERT. If you see me running, try to keep up."

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Offline Mr. Scientist

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Lessons In Physics
« Reply #97 on: 08/01/2009 15:59:27 »
Alright, take a Chile pill  [:D] [;D]

Heehee,

This one had me in tears for some reason lol
http://www.youtube.com/watch?v=SZGcNx8nV8U

''God could not have had much time on His hands when he formed the Planck Lengths.''

 ̿ ̿ ̿ ̿̿'\̵͇̿̿\=(●̪)=/̵͇̿̿/'̿'̿̿̿ ̿ ̿̿ ̿ ̿

٩๏̯͡๏۶

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Offline DoctorBeaver

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« Reply #98 on: 08/01/2009 17:15:57 »
Thought this was a lesson in physics not geography?

Indeed. So, let's talk about relecting light through 90o - a right-Angola.  [;D]
Fledgling science site at http://www.sciencefile.org/SF/content/view/54/98/ needs members and original articles. If you can help, please join.

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Offline syhprum

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« Reply #99 on: 08/01/2009 18:00:35 »
I note that the last 20 or posts have been devoted to humour, while a little lightening of heavy subjects is not out of place I cannot but feel a little miffed that this goes on while my quite serious discussion for the need for better spelling is vanquished to the outer wastes of 'Geek Speak'.
syhprum