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Author Topic: ALL PHYSICS DOUBTS - POST HERE !!  (Read 225305 times)

Offline Ghost Of Highbury

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Re: ALL PHYSICS DOUBTS - POST HERE !!
« Reply #2205 on: May 26, 2010, 08:47:51 pm »
Quote from: Shazizzzle on May 26, 2010, 08:44:38 pm
If you're not a 'Physics Doubt', you don't belong here. :P

hahaha!!
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Offline Weaam

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Re: ALL PHYSICS DOUBTS - POST HERE !!
« Reply #2206 on: May 26, 2010, 08:48:38 pm »
Quote from: A@di on May 26, 2010, 08:44:05 pm
3 minuts = 180s

energy = 40*180 = 7200J

change in temp = 5.9
250g = 0.25Kg
E = m*c*t

7200/0.25*5.9 = 4881J/kgK

Thaaanks a gajillion!

Could u also do from the same year Q4 part b?
Sorry for the trouble  :-[
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Offline Adzel

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Re: ALL PHYSICS DOUBTS - POST HERE !!
« Reply #2207 on: May 26, 2010, 08:49:11 pm »
Quote from: Shazizzzle on May 26, 2010, 08:44:38 pm
If you're not a 'Physics Doubt', you don't belong here. :P

Im not a 'Physics Doubt', Im a Physics student  :P

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Offline Adzel

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Re: ALL PHYSICS DOUBTS - POST HERE !!
« Reply #2208 on: May 26, 2010, 08:50:53 pm »
GOOD LUCK TO ALL INSHAALLAH
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Offline 8T

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Re: ALL PHYSICS DOUBTS - POST HERE !!
« Reply #2209 on: May 26, 2010, 08:52:12 pm »
Quote from: weaam on May 26, 2010, 08:48:38 pm
Thaaanks a gajillion!

Could u also do from the same year Q4 part b?
Sorry for the trouble  :-[
Weaan Dnt yew have the ms...?
There..
air molecules hit dust particles in all directions/move it in all directions B1
just as likely to be up as down
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Offline Ghost Of Highbury

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Re: ALL PHYSICS DOUBTS - POST HERE !!
« Reply #2210 on: May 26, 2010, 08:54:03 pm »
Quote from: weaam on May 26, 2010, 08:48:38 pm
Thaaanks a gajillion!

Could u also do from the same year Q4 part b?
Sorry for the trouble  :-[

The large number of air particles constantly collide with the dust particles in all directions which keeps most of them away from the ground

PS : however, as the ms says, its an equal probability that the dust particles will collide and fall, we ignore the ambiguity here.
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Offline Weaam

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Re: ALL PHYSICS DOUBTS - POST HERE !!
« Reply #2211 on: May 26, 2010, 08:54:53 pm »
Quote from: 8T on May 26, 2010, 08:52:12 pm
Weaan Dnt yew have the ms...?
There..
air molecules hit dust particles in all directions/move it in all directions B1
just as likely to be up as down
That kinda doesnt make sense "8T", thats why im asking!
Plus i wanna know how the diagram is supposed to look like!
I have a feeling im gunna screw up physics so baad tmr!
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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
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Offline Ashe

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Re: ALL PHYSICS DOUBTS - POST HERE !!
« Reply #2212 on: May 26, 2010, 08:55:17 pm »
Quote from: Adzel on May 26, 2010, 08:33:22 pm
Small current swiches on large current....

thanks :) is that all? is there any like... safety reason? or smthn?
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Offline Weaam

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Re: ALL PHYSICS DOUBTS - POST HERE !!
« Reply #2213 on: May 26, 2010, 08:56:02 pm »
Quote from: A@di on May 26, 2010, 08:54:03 pm
The large number of air particles constantly collide with the dust particles in all directions which keeps most of them away from the ground

PS : however, as the ms says, its an equal probability that the dust particles will collide and fall, we ignore the ambiguity here.
Umm ... how is the diagram supposed to look like..?
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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

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Re: ALL PHYSICS DOUBTS - POST HERE !!
« Reply #2214 on: May 26, 2010, 08:56:34 pm »
gud lk 2 u ppl[/b][/color][/size]
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Offline Helium

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Re: ALL PHYSICS DOUBTS - POST HERE !!
« Reply #2215 on: May 26, 2010, 08:57:32 pm »
Quote from: Adzel on May 26, 2010, 08:44:21 pm
Why don't you check the Mark Scheme  :-\

marking scheme sometimes just gives answer,
some people want to know why or how ???
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Offline Ghost Of Highbury

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Re: ALL PHYSICS DOUBTS - POST HERE !!
« Reply #2216 on: May 26, 2010, 08:58:06 pm »
Quote from: weaam on May 26, 2010, 08:56:02 pm
Umm ... how is the diagram supposed to look like..?

They haven't asked for the diagram in that subpart. Its not required, and drawing the huge no. of air particles colliding with dust particles is insane, just imagine that there is a huge no. of collisions going on which keeps the dust from falling down..
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Offline eastrimx

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Re: ALL PHYSICS DOUBTS - POST HERE !!
« Reply #2217 on: May 26, 2010, 09:01:16 pm »
can someone help me with the question 4 in october/nov 2008 paper 3 first variant?

http://www.freeexampapers.us/IGCSE/Physics/CIE/2008%20Nov/0625_w08_ms_3.pdf

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Offline Vin

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Re: ALL PHYSICS DOUBTS - POST HERE !!
« Reply #2218 on: May 26, 2010, 09:01:55 pm »
Quote from: Helium on May 26, 2010, 08:57:32 pm
marking scheme sometimes just gives answer,
some people want to know why or how ???

https://studentforums.biz/index.php/topic,6468.msg228261.html#msg228261
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Offline Weaam

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Re: ALL PHYSICS DOUBTS - POST HERE !!
« Reply #2219 on: May 26, 2010, 09:02:08 pm »
Quote from: A@di on May 26, 2010, 08:58:06 pm
They haven't asked for the diagram in that subpart. Its not required, and drawing the huge no. of air particles colliding with dust particles is insane, just imagine that there is a huge no. of collisions going on which keeps the dust from falling down..
Actually it says, explain why the dust particles have not fallen to the floor. you may DRAW A LABELLED DIAGRAM to help your explanation...
I wonder what kind of diagram are we meant to draw and label here..
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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
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