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Odai View Drop Down
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    Posted: 28 Nov 2009 at 5:20pm
I meant that A-level is rubbish, in that what you learn is wrong. But I guess that makes it hard in turn. Tongue
ʎɐqǝ uo pɹɐoqʎǝʞ ɐ ʎnq ı ǝɯıʇ ʇsɐן ǝɥʇ sı sıɥʇ
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Tell me about it .
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A-level and understanding are oxymorons. Wink
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No, but my teachers promote understanding and good grades. (Private School)
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I don't think it's on the syllabus though.
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Quote It's actually a very complicated result of quantum mechanics. It's more about where there is the highest probability of finding an electron is.


I don't know if your going to be surprised or not but they have told us that in physics and in chemistry.
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They dumb a lot of things down in A-level to the point it's not true anymore.
 
I'm assuming you've done s,p,d,f orbitals in Chemistry? They tell you it's the path electrons (which are described as balls of matter) take around the nucleus. It's actually a very complicated result of quantum mechanics. It's more about where there is the highest probability of finding an electron is.
ʎɐqǝ uo pɹɐoqʎǝʞ ɐ ʎnq ı ǝɯıʇ ʇsɐן ǝɥʇ sı sıɥʇ
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Oh good, i liked that with A-level chemistry, didn't understand most of the concepts because they just didn't add up.
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Which makes sense, as anything in freefall will have a downward acceleration of 9.81ms^-2 (which is the gravitational force on Earth).  As long as it's within an acceptable margin of this value it's fine, because in experimental conditions it's not going to be a perfectly 'fair test'.
 
No it's not, 9.81...ms^-2 is the acceleration of free fall at surface level.
 
The strength of a gravitational force of attraction is dependent on the masses of the two particles and the distance between them. In addition, the unit of force is the Newton. ms^-2 is one of the units of acceleration, not force.  
 
Quote I'm doing wave-particle duality at the moment, i understand the concept it's just trying to visualise it is mind boggerling!Confused
 
Then don't try. Wink
 
If you become a physicist, alot of the rubbish you learn at A-level goes out the window anyway, and you do it properly from scratch with maths. You can't visualise what's going on, unless you're mutant. The way we've evolved means we can deal with what happens in out everyday normal lives, not what happens at the small end of the scale.
 
So just try to appreciate the implications of what it all means.
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I'm doing wave-particle duality at the moment, i understand the concept it's just trying to visualise it is mind boggerling!Confused
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Originally posted by Kelvin_C-J Kelvin_C-J wrote:

  
They got 9.94 ms-1 as the acceleration.
 
 
Which makes sense, as anything in freefall will have a downward acceleration of 9.81ms^-2 (which is the gravitational force on Earth).  As long as it's within an acceptable margin of this value it's fine, because in experimental conditions it's not going to be a perfectly 'fair test'.
Kind regards,
Tom
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Originally posted by Odai Odai wrote:

Kelvin, I can help you with that if you want, but could you draw the equation instead?
 
Odai, I found out how to do it by virtue of the evaluation paper.
 
It said it as g = gradient x 3 x(0.90)squared.
 
They got 9.94 ms-1 as the acceleration.
 
 
Best Regards,
Kelvin Chilvers-Jones


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Kelvin, I can help you with that if you want, but could you draw the equation instead?
ʎɐqǝ uo pɹɐoqʎǝʞ ɐ ʎnq ı ǝɯıʇ ʇsɐן ǝɥʇ sı sıɥʇ
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Oh AS Mechanics (OCR G481) is the easy one!  You wait 'til G482 Electrons, Waves & Photons and then at A2 the Newtonian World stuff on Circular Motion, Gas Laws, Capacitance and Nuclear Physics!  It's absolutely mind boggling!  Frankly, people doing GCSE's don't know how lucky they are!
Kind regards,
Tom
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I've got my first Modules in January for Maths and Physics..
 
I'll be blunt.. I'll be very happy if I get anything over a U !
 
Soo much harder than GCSE!!
 
It's crazy - they give you 2 years at GCSE to learn 'normal' stuff, yet, @ AS / A2, they give you 6 months, to learn 'hard' stuff.
 
I'm also easily distracted.
 
I hadn' a clue what to do in my Physics paper this morning!
 
One question was:
 
1/t(squared)=(g/3x(squared))h-R.
 
From this, take X to be the value in figure 1.1 ( X= 0.90m) and calculate the acceleration due to free fall, g, on the object.
 
Use your gradient (h) (derived from earlier question) and X to calculate it.
 
R is a constant value.
Best Regards,
Kelvin Chilvers-Jones


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737Chris View Drop Down
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Haha, I think I should get a filing cabinet with hard copies in it as well, just to be safe !

ThanksSmile
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Nice to see you are still alive, I've learnt that lesson aswell! At work i have a filing cabinet, i keep everything filed for 4 weeks and then throw it away!

Good luck on your retakes.
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Thanks AA !Big%20smile
 
I know exactly what you mean with revision, I cant do it that well, although Im good at college in the library
I think my dad will take a part my computer if i dont revise ! haha 
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Originally posted by 737Chris 737Chris wrote:

Haha this might sound strange but I'm glad to hear that.  I am absolutely terrible and the electronics side of Physics as well, I thought i was the only one. . . . My teacher isnt particualy bad but hes very ecentric so learning is. . . . .hard . . . . .

I wish you all the best Tom, Im sure we can get through this!
 
Yeah know exactly how you feel!  My teacher's a nice enough bloke but he's clueless, he actually asks the students whether he's right or not!  I'm lousy at revision too.  I've never been able to get on with revision at home, I always end up getting distracted by something or other - the forum, something good on TV, Flight Sim etc!  What with this new computer coming in a couple of weeks I can't see much revision getting done at all!  I'm screwed!
Kind regards,
Tom
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Glad to hear you're not dead!Tongue

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