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Author Topic: Physics Help HERE ONLY !!  (Read 81577 times)

Offline aj ahmed07

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Re: Physics Help HERE ONLY !!
« Reply #45 on: May 23, 2009, 06:52:48 pm »
thnxxxx dude.........awesome links and notes.................thanxxxxxxxx again ;D ;D ;D ;D ;D ;D ;D
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Offline godfather93

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Re: Physics Help HERE ONLY !!
« Reply #46 on: May 23, 2009, 06:54:43 pm »
thanks!
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Offline qwert101

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Re: Physics Help HERE ONLY !!
« Reply #47 on: May 23, 2009, 07:18:29 pm »
Quote from: astarmathsandphysics on May 23, 2009, 06:09:03 pm
Quote from: qwert101 on May 23, 2009, 06:07:49 pm
hi people,

whats the formula connecting the number of electrons, time, and charge?
it was on M/J 02

q 7c) i) and ii)

thanks alot, Just need to know the formula, I ve forgotten it! ???

Q=net

great! , thanks but what does e stand for , n is number of electrons, q is charge, t is time right?
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Offline godfather93

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Re: Physics Help HERE ONLY !!
« Reply #48 on: May 23, 2009, 07:25:00 pm »
it's number of electrons x time
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Offline MaNa

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Re: Physics Help HERE ONLY !!
« Reply #49 on: May 23, 2009, 07:28:16 pm »
Quote from: Bani on May 23, 2009, 05:32:42 pm
Quote from: godfather93 on May 23, 2009, 05:16:54 pm
Quote from: mana on May 23, 2009, 04:56:09 pm
Quote from: godfather93 on May 23, 2009, 04:54:49 pm
it's a very similar arrangement to the cathode ray tube.
can u explain n tell me
please :)

here's a rough drawing of the thing

mana, for part ii), the readings that would need to be taken are: First, record the background radiation (without the source and absorber), then record the radiation count with the source (using the detector) and lastly, record the radiaiton count with source and absorber (using the detector).

P.S Did anyone try drawing for Q7a), May/June 2008, paper 3???
THANK YOU SOOOOOO MUCH :D:D:D:D:D :D ;D
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Offline MaNa

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Re: Physics Help HERE ONLY !!
« Reply #50 on: May 23, 2009, 07:28:56 pm »
Quote from: godfather93 on May 23, 2009, 05:16:54 pm
Quote from: mana on May 23, 2009, 04:56:09 pm
Quote from: godfather93 on May 23, 2009, 04:54:49 pm
it's a very similar arrangement to the cathode ray tube.
can u explain n tell me
please :)

here's a rough drawing of the thing
thankyou god father:D
ohh so when they ask this much labelling is enough?
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Offline godfather93

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Re: Physics Help HERE ONLY !!
« Reply #51 on: May 23, 2009, 07:30:53 pm »
more than enough since it is only a 2 marks question (i think it's 2 marks, right)
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Offline MaNa

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Re: Physics Help HERE ONLY !!
« Reply #52 on: May 23, 2009, 07:33:35 pm »
Quote from: godfather93 on May 23, 2009, 07:30:53 pm
more than enough since it is only a 2 marks question (i think it's 2 marks, right)
alright
but yab3 if they ask (irrelevent to markzs) this much labelling iss enough? bcuz i have three book but none of them have this method:S
ooh so could Cathode ray tube could be mention too
bcuz thats also to identify beta particle:S
By the way + rep for u:D
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Offline godfather93

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Re: Physics Help HERE ONLY !!
« Reply #53 on: May 23, 2009, 07:39:09 pm »
thanks!
yes, this labelling is enough. there's nothing left to label anyways. you may put the whole setting inside a tube or not. Depends.
it's not exactly a CRT. (we r measuring the percentage of beta particles passing through the aluminium sheet)
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Offline MaNa

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Re: Physics Help HERE ONLY !!
« Reply #54 on: May 23, 2009, 07:40:13 pm »
oooooh
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Offline esso

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Re: Physics Help HERE ONLY !!
« Reply #55 on: May 23, 2009, 09:15:44 pm »
could some one help in this question
nov 2008
paper 3
ques.1)d
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Offline X Abdulrahman X

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Re: Physics Help HERE ONLY !!
« Reply #56 on: May 23, 2009, 09:23:22 pm »
Quote from: esso on May 23, 2009, 09:15:44 pm
could some one help in this question
nov 2008
paper 3
ques.1)d

V=0.5 x 1.2
V=0.6m/s
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Offline X Abdulrahman X

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Re: Physics Help HERE ONLY !!
« Reply #57 on: May 23, 2009, 09:24:24 pm »
d ii) 0.6 x 1.2 = 0.72m
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When they talk about me they say I be trippin
What they say about me doesn't make me mad 
I think they hatin cause they see me when I'm rollin
Man I can't help it that they really doin bad  =P

Big cars, Big wheels, Big chains, Big pimpin', Big money, Big Dreams ;-)

Offline esso

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Re: Physics Help HERE ONLY !!
« Reply #58 on: May 23, 2009, 09:50:56 pm »
2nd variant paper not first
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Offline MaNa

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Re: Physics Help HERE ONLY !!
« Reply #59 on: May 23, 2009, 10:07:36 pm »
When do we use cathode ray tube?
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