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Author Topic: Physics Help HERE ONLY !!  (Read 81769 times)

Offline Eamyzz

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Re: Physics Help HERE ONLY !!
« Reply #615 on: June 03, 2009, 06:51:25 pm »
wat is da difference By the way motors and generators and da uses simply evrythng ?
PLEASE REPLY FAST  ;D
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Offline devileye

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Re: Physics Help HERE ONLY !!
« Reply #616 on: June 03, 2009, 06:55:23 pm »
By the way those are brushes which connect to the circuit but in another way it's medium of connection which is joint to both brushes and coil...and it's function is to rotate with the coil...as when the coil in vertical it's doesn't have enough force to turn...the commutator overshoots the vertical and changes the direction of the current through it..making it turn.....commutators are mainly in dc motors ...in ac generators they don much as ac requires a shaft to turn the coil..not any source such as battery to be specific steam is used in power stations...
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Offline Kim

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Re: Physics Help HERE ONLY !!
« Reply #617 on: June 03, 2009, 06:56:20 pm »
Quote from: Eamyzz on June 03, 2009, 06:51:25 pm
wat is da difference By the way motors and generators and da uses simply evrythng ?
PLEASE REPLY FAST  ;D
dc motor
supplied with dc current
changes electrical to motion energy
the outside circuit is connected to a battery switch or rheostat
its brushes touch two halves of a commutator

Ac motor
supplied with ac current
changes motion to electrical
outside circuit is connected to lamp or voltmeter
its brushes touch 2 separate split rings
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Offline goin4dakill

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Re: Physics Help HERE ONLY !!
« Reply #618 on: June 03, 2009, 06:58:20 pm »
Quote from: goin4dakill on June 03, 2009, 06:42:36 pm
Heyyy Guys!
Okay, i have some very important advice- thats a secret. So dont tell anyone!!!!!!!!!!! ha. Plus points there..hahah
DESPITE THE FACT THAT I AM NOT TELLING A STUDENT FORUM FULL OF THOUSANDS OF PEOPLE!

ANyway, So for the paper 6..the night before I did a past paper 2006 june. The first three questions in teh 2009 paper, were exactly the same. And i mean EEEZACTLY.
So, according to my calculations (inhaler, push glasses up nose, haha dork attack) umm, they might base paper 3 from June 2006 as well.

If you have an inhaler- umm I was kiddinggggg - i love people with inhalers :D <3  


Just so everyone gets to seeee
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Offline Kim

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Re: Physics Help HERE ONLY !!
« Reply #619 on: June 03, 2009, 07:01:36 pm »
ok ppl i have to go now
so best of luck to all of you :D bye
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After all is said and done, more is said than done.

By the time a man realizes that maybe his father was right, he usually has a son who thinks he’s wrong.

The early bird may get the worm, but the second mouse gets the cheese.

Offline esso

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Re: Physics Help HERE ONLY !!
« Reply #620 on: June 03, 2009, 07:05:00 pm »
whats the correct definition of HALF LIFE ??
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Offline Ghost Of Highbury

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Re: Physics Help HERE ONLY !!
« Reply #621 on: June 03, 2009, 07:07:00 pm »
The half-life of a radioactive substance  is the interval required for the quantity to decay to half of its initial value
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Offline sweetie

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Re: Physics Help HERE ONLY !!
« Reply #622 on: June 03, 2009, 07:19:51 pm »
wat is da constant in
       
resistance= constant x length/ cross- sectional area

plzzzzz reply quick
thanx
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Offline MaNa

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Re: Physics Help HERE ONLY !!
« Reply #623 on: June 03, 2009, 07:20:22 pm »
GUys can anyoone tell me how much u needa get in paper 3 to get an A*
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Offline AS girl

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Re: Physics Help HERE ONLY !!
« Reply #624 on: June 03, 2009, 07:21:48 pm »
Quote from: ManaH on June 03, 2009, 07:20:22 pm
GUys can anyoone tell me how much u needa get in paper 3 to get an A*

It depends on the curve!! If the curve is low this year (hope so) u can get an A* with no effort!
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Offline Eamyzz

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Re: Physics Help HERE ONLY !!
« Reply #625 on: June 03, 2009, 07:22:27 pm »
Quote from: kim on June 03, 2009, 06:56:20 pm
Quote from: Eamyzz on June 03, 2009, 06:51:25 pm
wat is da difference By the way motors and generators and da uses simply evrythng ?
PLEASE REPLY FAST  ;D
dc motor
supplied with dc current
changes electrical to motion energy
the outside circuit is connected to a battery switch or rheostat
its brushes touch two halves of a commutator

Ac motor
supplied with ac current
changes motion to electrical
outside circuit is connected to lamp or voltmeter
its brushes touch 2 separate split rings



thank u u r an angel u deserve a +rep ;)
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Live=Hope
Hope=Life
Life=Love
So,No life=No hope=DEATH
am alive =D

Offline MaNa

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Re: Physics Help HERE ONLY !!
« Reply #626 on: June 03, 2009, 07:23:48 pm »
Quote from: IG girl on June 03, 2009, 07:21:48 pm
Quote from: ManaH on June 03, 2009, 07:20:22 pm
GUys can anyoone tell me how much u needa get in paper 3 to get an A*

It depends on the curve!! If the curve is low this year (hope so) u can get an A* with no effort!
i mean like average
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Offline Eamyzz

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Re: Physics Help HERE ONLY !!
« Reply #627 on: June 03, 2009, 07:25:14 pm »
manah and Ig grl i love ur pictures...they r so WOOOOOW  :o  ;)
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Live=Hope
Hope=Life
Life=Love
So,No life=No hope=DEATH
am alive =D

Offline MaNa

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Re: Physics Help HERE ONLY !!
« Reply #628 on: June 03, 2009, 07:25:48 pm »
Quote from: Eamyzz on June 03, 2009, 07:25:14 pm
manah and Ig grl i love ur pictures...they r so WOOOOOW  :o  ;)
thankyou :)
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Offline care

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Re: Physics Help HERE ONLY !!
« Reply #629 on: June 03, 2009, 07:26:02 pm »
can someone explain me the difference between virtual and real image?
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