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Author Topic: ALL PHYSICS DOUBTS - POST HERE !!  (Read 225337 times)

Offline Ghost Of Highbury

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Re: ALL PHYSICS DOUBTS - POST HERE !!
« Reply #2085 on: May 26, 2010, 05:43:17 pm »
Quote from: ang3l on May 26, 2010, 05:36:28 pm
Okay...thx Thats muchh eaiser :D

Q1 both parts..

http://www.freeexampapers.us/IGCSE/Physics/CIE/2009%20Nov/0625_w09_qp_32.pdf

I think you should measure the angle between the vertical to the fixed point and B.
Do this with a large protractor fixed to a board behind the swinging weight.
The weight will be moving v slowly at the endpoints and should be easy to measure.

It is the largest distance from the centre or rest or hanging point
you can also callit an angle in the case of a pendulum


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holtadit

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Re: ALL PHYSICS DOUBTS - POST HERE !!
« Reply #2086 on: May 26, 2010, 05:44:48 pm »
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Offline aoas

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Re: ALL PHYSICS DOUBTS - POST HERE !!
« Reply #2087 on: May 26, 2010, 05:45:02 pm »
This is the best website i've seen for PHYSICS
http://www.gcse.com/physics.htm
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Offline Malak

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Re: ALL PHYSICS DOUBTS - POST HERE !!
« Reply #2088 on: May 26, 2010, 05:47:16 pm »
Quote from: Ari Ben Canaan on May 26, 2010, 05:44:48 pm

NOOOOO !!!   ::) ::) ::)

Lol...Umm I think its jst First voltage - second voltage ( maybe..)
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Offline Helium

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Re: ALL PHYSICS DOUBTS - POST HERE !!
« Reply #2089 on: May 26, 2010, 05:50:24 pm »
From 06 may june,

If anyone would mind telling me how the find  specific latent heat of vaporisation.
When there is  watt heater
I know energy needed to boil water at 100= 2300000(J/kg) * mass in Kg
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Offline Weaam

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Re: ALL PHYSICS DOUBTS - POST HERE !!
« Reply #2090 on: May 26, 2010, 05:52:49 pm »
Quote from: A@di on May 26, 2010, 05:33:06 pm
attached
Are you sure??
and it doesnt have part (i) in it ..
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Offline Malak

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Re: ALL PHYSICS DOUBTS - POST HERE !!
« Reply #2091 on: May 26, 2010, 05:54:10 pm »
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Offline Ghost Of Highbury

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Re: ALL PHYSICS DOUBTS - POST HERE !!
« Reply #2092 on: May 26, 2010, 05:55:56 pm »
The voltage drop. Refer to the nov 09 Q.

The overall voltage reduced from 22K Volts due to the resistance of the wire, till it reaches the receiving end.

I know this is confusing sh*t, it had appeared in my paper! nov 09! V = 2.5*3 = 7.5

from wiki "For example, an electric space heater may very well have a resistance of ten ohms, and the wires which supply it may have a resistance of 0.2 ohms, about 2% of the total circuit resistance. This means that 2% of the supplied voltage is actually being lost by the wire itself."
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Offline Ghost Of Highbury

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Re: ALL PHYSICS DOUBTS - POST HERE !!
« Reply #2093 on: May 26, 2010, 05:58:06 pm »
Quote from: weaam on May 26, 2010, 05:52:49 pm
Are you sure??
and it doesnt have part (i) in it ..

yes sure, oh abt the (i) part..both towards the center..centrifugal force..
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Offline Shazizzzle

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Re: ALL PHYSICS DOUBTS - POST HERE !!
« Reply #2094 on: May 26, 2010, 06:02:33 pm »
Are we screwed?  :D
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Offline Weaam

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Re: ALL PHYSICS DOUBTS - POST HERE !!
« Reply #2095 on: May 26, 2010, 06:03:43 pm »
Quote from: Shazizzzle on May 26, 2010, 06:02:33 pm
Are we screwed?  :D
If ur talking about the exam then yes, i believe we are
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- The man who smiles when things go wrong has thought of someone to blame it on. - Robert Bloch.
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Offline Ivo

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Re: ALL PHYSICS DOUBTS - POST HERE !!
« Reply #2096 on: May 26, 2010, 06:05:56 pm »
Hey, please can someone explain how you work out Q6)a)iii) for w09.  Link for paper is: http://www.freeexampapers.us/IGCSE/Physics/CIE/2009%20Nov/0625_w09_qp_31.pdf
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Offline Weaam

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Re: ALL PHYSICS DOUBTS - POST HERE !!
« Reply #2097 on: May 26, 2010, 06:06:25 pm »
Quote from: A@di on May 26, 2010, 05:58:06 pm
yes sure, oh abt the (i) part..both towards the center..centrifugal force..
ok then, thank yoooou!  :D
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- The man who smiles when things go wrong has thought of someone to blame it on. - Robert Bloch.
-I saw weird stuff in that place last night. Weird, strange, sick, twisted, eerie, godless, evil stuff... and I went in. - Homer
+ Rep me if i have been of any assistance to you ;D

Offline Ghost Of Highbury

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Re: ALL PHYSICS DOUBTS - POST HERE !!
« Reply #2098 on: May 26, 2010, 06:10:07 pm »
Quote from: Helium on May 26, 2010, 05:50:24 pm
From 06 may june,

If anyone would mind telling me how the find  specific latent heat of vaporisation.
When there is  watt heater
I know energy needed to boil water at 100= 2300000(J/kg) * mass in Kg

0.05g = 1s
Xg = 20X seconds

120*20x = specific heat of vaporization * X

specific heat ........  = 2400X/X = 2400kJ/kg
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Offline 33oomar

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Re: ALL PHYSICS DOUBTS - POST HERE !!
« Reply #2099 on: May 26, 2010, 06:10:29 pm »
Hey guys i really really need help in :
Q2 PAPER 3 MAY/JUNE 2007
CAN SOMEONE PLEASE EXPLAIN IT TO ME ???
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