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Author Topic: ALL PHYSICS DOUBTS - POST HERE !!  (Read 197640 times)

Offline 8T

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Re: ALL PHYSICS DOUBTS - POST HERE !!
« Reply #2160 on: May 26, 2010, 08:06:06 pm »
Quote from: Ivo on May 26, 2010, 08:03:56 pm
Where?
So Boyle's Law is that if temperature is constant, then when volume decreases, pressure increases?
If u can answer it ..its is the one (:
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Offline Vin

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Re: ALL PHYSICS DOUBTS - POST HERE !!
« Reply #2161 on: May 26, 2010, 08:06:18 pm »
Charles' Law

The volume of a fixed mass of gas id directly proportional to its absolute temperature if the pressure is kept constant
V/T = K

Pressure Law

The pressure of a fixed mass of gas is directly propotional to its absolute temperature if the volume is kept constant
p/T = K

Boyle's Law

For a fixed mass of gas at constant tmeperature

pV = K

combining the laws

p1V1      p2V2
------ = -----
T1           T2
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Offline 8T

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Re: ALL PHYSICS DOUBTS - POST HERE !!
« Reply #2162 on: May 26, 2010, 08:06:37 pm »
Quote from: thenewkid™ on May 26, 2010, 08:03:24 pm
yes
objects tht hv internal energy are like a hot water bottle
Thanks.
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Offline rhea

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Re: ALL PHYSICS DOUBTS - POST HERE !!
« Reply #2163 on: May 26, 2010, 08:07:11 pm »
Quote from: Adzel on May 26, 2010, 08:02:48 pm
Nope those are called slip rings...Dont get mixed up!

okay just one thing~

could you write a two-line use of split ring and slip ring..
incase it comes...
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Offline Adzel

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Re: ALL PHYSICS DOUBTS - POST HERE !!
« Reply #2164 on: May 26, 2010, 08:08:19 pm »
@ rhea:

Slip Rings -----> <----- AC Generator


Split Rings -----> <----- DC Motor
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Offline diva_sparkles

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Re: ALL PHYSICS DOUBTS - POST HERE !!
« Reply #2165 on: May 26, 2010, 08:08:48 pm »
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Offline Shazizzzle

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Re: ALL PHYSICS DOUBTS - POST HERE !!
« Reply #2166 on: May 26, 2010, 08:09:25 pm »
Umm, is it necessary to use the absolute temperature, i.e Kelvin, when using the gas laws?

Because, in many of the past papers, we do not covert the temp. from deg. C to deg. K. Do we have to?

Some books say the only correct answer is obtained using K.
But, isn't that just the same thing? :S

i.e K = 273 + C
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Offline 8T

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Re: ALL PHYSICS DOUBTS - POST HERE !!
« Reply #2167 on: May 26, 2010, 08:10:07 pm »
Quote from: ~VIN1094~ on May 26, 2010, 08:06:18 pm
Charles' Law

The volume of a fixed mass of gas id directly proportional to its absolute temperature if the pressure is kept constant
V/T = K

Pressure Law

The pressure of a fixed mass of gas is directly propotional to its absolute temperature if the volume is kept constant
p/T = K

Boyle's Law

You should have someone calling you MR HELPFUL xD
Thanks Vin for helping us all (:

For a fixed mass of gas at constant tmeperature

pV = K

combining the laws

p1V1      p2V2
------ = -----
T1           T2
You should be called Mr helpful xD
« Last Edit: May 26, 2010, 08:13:32 pm by 8T »
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Offline diva_sparkles

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Re: ALL PHYSICS DOUBTS - POST HERE !!
« Reply #2168 on: May 26, 2010, 08:11:17 pm »
Quote from: Shazizzzle on May 26, 2010, 08:09:25 pm
Umm, is it necessary to use the absolute temperature, i.e Kelvin, when using the gas laws?

Because, in many of the past papers, we do not covert the temp. from deg. C to deg. K. Do we have to?

Some books say the only correct answer is obtained using K.
But, isn't that just the same thing? :S

i.e K = 273 + C

actualy in pastpapers u hd 2 do tht !!
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Offline Ivo

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Re: ALL PHYSICS DOUBTS - POST HERE !!
« Reply #2169 on: May 26, 2010, 08:11:46 pm »
OK, super hard question for Q10)  If someone can guide me through how to work out b) onwards, that would be most helpful.

This is same paper, w09.
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Offline Ghost Of Highbury

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Re: ALL PHYSICS DOUBTS - POST HERE !!
« Reply #2170 on: May 26, 2010, 08:12:21 pm »
Quote from: Ivo on May 26, 2010, 08:11:46 pm
OK, super hard question for Q10)  If someone can guide me through how to work out b) onwards, that would be most helpful.

year, session? paper link?
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Offline mdwael

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Re: ALL PHYSICS DOUBTS - POST HERE !!
« Reply #2171 on: May 26, 2010, 08:12:54 pm »
Please please please can someone draw me the answer for the missing connections its question 9a in oct nov 2006 paper 3 physics (i) part how to I draw it?
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Offline Ivo

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Re: ALL PHYSICS DOUBTS - POST HERE !!
« Reply #2172 on: May 26, 2010, 08:14:26 pm »
Quote from: A@di on May 26, 2010, 08:12:21 pm
year, session? paper link?

Sorry, here it is: http://www.freeexampapers.us/IGCSE/Physics/CIE/2009%20Nov/0625_w09_qp_31.pdf

I don't understand how it is worked out.
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Offline 33oomar

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Re: ALL PHYSICS DOUBTS - POST HERE !!
« Reply #2173 on: May 26, 2010, 08:15:48 pm »
guys i need help in q8 May / JUne 2007 Paper 3 Part B
PLEASE
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Offline Vin

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Re: ALL PHYSICS DOUBTS - POST HERE !!
« Reply #2174 on: May 26, 2010, 08:16:59 pm »
Quote from: mdwael on May 26, 2010, 08:12:54 pm
Please please please can someone draw me the answer for the missing connections its question 9a in oct nov 2006 paper 3 physics (i) part how to I draw it?
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