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Author Topic: Physics Help HERE ONLY !!  (Read 81740 times)

Offline care

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Re: Physics Help HERE ONLY !!
« Reply #660 on: June 03, 2009, 08:08:55 pm »
Quote from: Adi...\m/ on June 03, 2009, 08:02:40 pm
okk...good idea
try sweetsh angel's question

find it attached



i think it's 170°
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Offline Ghost Of Highbury

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Re: Physics Help HERE ONLY !!
« Reply #661 on: June 03, 2009, 08:09:58 pm »
i'm getting 160
???no idea
difficult..
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Offline Ghost Of Highbury

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Re: Physics Help HERE ONLY !!
« Reply #662 on: June 03, 2009, 08:10:43 pm »
Quote from: reishamix on June 03, 2009, 08:08:33 pm
wht papers shud i do ryt now??
n which years de hardest??
do 2006 and 1993,4, papers
difficult ones,,
good luck
 :)
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Offline reishamix

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Re: Physics Help HERE ONLY !!
« Reply #663 on: June 03, 2009, 08:12:06 pm »
Quote from: Adi...\m/ on June 03, 2009, 08:10:43 pm
Quote from: reishamix on June 03, 2009, 08:08:33 pm
wht papers shud i do ryt now??
n which years de hardest??
do 2006 and 1993,4, papers
difficult ones,,
good luck
 :)



Thanks
 ;D
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Offline care

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Re: Physics Help HERE ONLY !!
« Reply #664 on: June 03, 2009, 08:12:18 pm »
i think that you should add the angle PQN to the angle MRS. so, that is 85°+85°=170°
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Offline Ghost Of Highbury

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Re: Physics Help HERE ONLY !!
« Reply #665 on: June 03, 2009, 08:13:40 pm »
i extended both the lines behind the image and calculated the angle where they meet..

i got 160
i guess ur way is correct

do u have the markscheme??
i dont
 :-\
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Offline goin4dakill

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Re: Physics Help HERE ONLY !!
« Reply #666 on: June 03, 2009, 08:16:39 pm »
OMG GUYS URGENTLY!!!!!!!!

I have a question..
If they ask you to draw a DC motor??? HOW?? My book doesnt have it..
and and AC MOTOR? what id they ask us that..its realy comlicated..what with the split ring commutators and all. HELP EEK!
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Offline Eamyzz

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Re: Physics Help HERE ONLY !!
« Reply #667 on: June 03, 2009, 08:17:01 pm »
ppl i remember its smthng related to math its an angles rule but i dont really remember it 1 whole year nt taking math  :-\
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Offline care

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Re: Physics Help HERE ONLY !!
« Reply #668 on: June 03, 2009, 08:17:06 pm »
i ve got the MS.. but i can't understand it!
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Offline Ghost Of Highbury

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Re: Physics Help HERE ONLY !!
« Reply #669 on: June 03, 2009, 08:20:16 pm »
the markscheme says its 160
yuppee..
i was correct
lol..
find the answer attached
(not sure)
 :)
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Offline care

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Re: Physics Help HERE ONLY !!
« Reply #670 on: June 03, 2009, 08:21:32 pm »
well done :D
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Offline goin4dakill

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Re: Physics Help HERE ONLY !!
« Reply #671 on: June 03, 2009, 08:24:49 pm »
guys?  :'(
How do u draw a dc motor..
and ac motor?
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Offline Ghost Of Highbury

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Re: Physics Help HERE ONLY !!
« Reply #672 on: June 03, 2009, 08:25:19 pm »
Quote from: goin4dakill on June 03, 2009, 08:16:39 pm
OMG GUYS URGENTLY!!!!!!!!

I have a question..
If they ask you to draw a DC motor??? HOW?? My book doesnt have it..
and and AC MOTOR? what id they ask us that..its realy comlicated..what with the split ring commutators and all. HELP EEK!

my book has it
the drawing of dc motor
but unfortunately my scanner is not functioning
if u use tom duncan physics
chk out pg 221
--

well i can provide u with the text though
heres it
a simple dc motor consists of a rectangular coil of wire mounted on an axle which can rotate between the poles of a C-shaped magnet, each end of the coil is connected to half of a split ring of copper, called a commutator.
which rotates with the coil
two carbon blocks the brushes are perssed lightly against the sommutatoor by springs. the brushes are connected to an electric supply.
 :)
find the image in google images
good luck
http://cache.eb.com/eb/image?id=63375&rendTypeId=4
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Offline Ghost Of Highbury

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Re: Physics Help HERE ONLY !!
« Reply #673 on: June 03, 2009, 08:28:55 pm »
sry no clue abt ac motor
but chk out wikipedia
i got a note on motors
maybe it will help u
good luck
 :)
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Offline goin4dakill

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Re: Physics Help HERE ONLY !!
« Reply #674 on: June 03, 2009, 08:29:43 pm »
Quote from: Adi...\m/ on June 03, 2009, 08:25:19 pm
Quote from: goin4dakill on June 03, 2009, 08:16:39 pm
OMG GUYS URGENTLY!!!!!!!!

I have a question..
If they ask you to draw a DC motor??? HOW?? My book doesnt have it..
and and AC MOTOR? what id they ask us that..its realy comlicated..what with the split ring commutators and all. HELP EEK!

my book has it
the drawing of dc motor
but unfortunately my scanner is not functioning
if u use tom duncan physics
chk out pg 221
--

well i can provide u with the text though
heres it
a simple dc motor consists of a rectangular coil of wire mounted on an axle which can rotate between the poles of a C-shaped magnet, each end of the coil is connected to half of a split ring of copper, called a commutator.
which rotates with the coil
two carbon blocks the brushes are perssed lightly against the sommutatoor by springs. the brushes are connected to an electric supply.
 :)
find the image in google images
good luck
http://cache.eb.com/eb/image?id=63375&rendTypeId=4


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