Author Topic: ALL PHYSICS DOUBTS - POST HERE !!  (Read 225233 times)

Offline 8T

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Re: ALL PHYSICS DOUBTS - POST HERE !!
« Reply #2160 on: May 26, 2010, 08:06:06 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

Offline 8T

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Re: ALL PHYSICS DOUBTS - POST HERE !!
« Reply #2162 on: May 26, 2010, 08:06:37 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 »
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...

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

Offline diva_sparkles

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Re: ALL PHYSICS DOUBTS - POST HERE !!
« Reply #2165 on: May 26, 2010, 08:08:48 pm »
Don’t ask what the world needs. Ask what makes you come alive, and go do it. Because what the world needs is people who have come alive!!

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
•$#@2™•

Offline 8T

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Re: ALL PHYSICS DOUBTS - POST HERE !!
« Reply #2167 on: May 26, 2010, 08:10:07 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 »
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 !!
Don’t ask what the world needs. Ask what makes you come alive, and go do it. Because what the world needs is people who have come alive!!

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 »
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 »
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

Offline Vin

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Re: ALL PHYSICS DOUBTS - POST HERE !!
« Reply #2174 on: May 26, 2010, 08:16:59 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?