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Author Topic: physics help  (Read 2929 times)

nid404

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physics help
« on: May 10, 2009, 03:45:14 pm »
Can some1 pls help me wid question 2 in nov 2005 and Please draw the circuits cause I don't understand the connections.
Thanx
« Last Edit: May 10, 2009, 07:40:55 pm by nid404 »
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nid404

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Re: physics nov 2005
« Reply #1 on: May 10, 2009, 04:53:51 pm »
please help. i have my paper day after tom.
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nid404

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Re: physics nov 2005
« Reply #2 on: May 10, 2009, 06:10:55 pm »
it's urgent guys. astar r u there???? need help
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Offline astarmathsandphysics

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Re: physics help
« Reply #3 on: May 10, 2009, 10:25:22 pm »
Which paper is it for?
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nid404

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Re: physics help
« Reply #4 on: May 11, 2009, 04:48:44 am »
It's paper 6. sorry i forgot to mention it
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Offline Christy

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Re: physics help
« Reply #5 on: May 11, 2009, 06:18:54 am »
wait do u have to draw circuit 1 or 2 ??

i think its circuit 2 ... so basically AB is one resistor and BC is one resistor ... these are connected in series

then CD is a resistor in parrallel ...

then a voltage also connected in parrallel ... then connect all of that to an ammeter and continue the circuit ....

hope u understand .. if u dont ill try putting up a pic.
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Offline AS girl

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Re: physics help
« Reply #6 on: May 11, 2009, 06:38:58 am »
Amber it would be gd if u put a pic!!
Your explanations i guess will confuse him!
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If i fall along the way pick me up and dust me off...and if i get too tired to make it..be my breath so i can walk!!

nid404

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Re: physics help
« Reply #7 on: May 11, 2009, 06:40:20 am »
i don't understand it and anyways we need to complete circuit 3. But thanx for ur help
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nid404

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Re: physics help
« Reply #8 on: May 11, 2009, 06:40:51 am »
Quote from: IG girl on May 11, 2009, 06:38:58 am
Amber it would be gd if u put a pic!!
Your explanations i guess will confuse him!


Its her
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Offline ny

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Re: physics help
« Reply #9 on: May 11, 2009, 06:47:56 am »
hey.
i have a question here.
physics-oct/nov 2008 paper 3 question 5c)
its about u have to calculate the value of the spcfc latent heat of fusion of ice.
i knew the how to do this,generally.but,what is the significnce of the 2.1 g of ice melted during the extra 2mins?why do we hve to subtract them from 16.3g?
Thanks.
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nid404

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Re: physics help
« Reply #10 on: May 11, 2009, 06:50:12 am »
yup cuz that amount of ice melts due to heat taken from the surroundings.
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Offline Christy

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Re: physics help
« Reply #11 on: May 11, 2009, 06:56:02 am »
ny ... to ur question .. bascially 16.3 is the mass we started with and 2.1 is wen the heater is switched off ...

latent heat is how much heat can they take ... so u subtract these two to find the mass that melted because of the heater ....

thats why we subtract the 2

and heres the pics :D
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Offline AS girl

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Re: physics help
« Reply #12 on: May 11, 2009, 07:01:41 am »
Quote from: nid404 on May 11, 2009, 06:40:51 am
Quote from: IG girl on May 11, 2009, 06:38:58 am
Amber it would be gd if u put a pic!!
Your explanations i guess will confuse him!


Its her


Thiis is my 100 post  :o  ;D
your explanation i guess will confuse her.   ;D

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If i fall along the way pick me up and dust me off...and if i get too tired to make it..be my breath so i can walk!!

Offline ny

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Re: physics help
« Reply #13 on: May 11, 2009, 07:03:04 am »
Quote from: Amber on May 11, 2009, 06:56:02 am
ny ... to ur question .. bascially 16.3 is the mass we started with and 2.1 is wen the heater is switched off ...

latent heat is how much heat can they take ... so u subtract these two to find the mass that melted because of the heater ....

thats why we subtract the 2



thanks.
so,is 16.3g  the original mass of the ice ?i thought that 16.3g is the mass of the ice melted after we heated them.
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Offline Christy

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Re: physics help
« Reply #14 on: May 11, 2009, 07:05:56 am »
it melted during the heater is on .. and the heater was switched off and 2.1g melted without the heater ...
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