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Author Topic: Physics Help HERE ONLY !!  (Read 81604 times)

Offline basoom16

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Re: phy pap 1 here
« Reply #765 on: June 09, 2009, 05:54:14 pm »
ohh ok. yes ur rite eddie
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Offline theigstudent

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Re: phy pap 1 here
« Reply #766 on: June 09, 2009, 05:58:26 pm »
oh ya
Thanks a million
:)
n does ny1 know abt the gradient
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<3 datz da way it izzzzzzzzzz <3

Offline Ghost Of Highbury

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Re: phy pap 1 here
« Reply #767 on: June 09, 2009, 06:01:16 pm »
which gradient

question no???
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Offline Clem

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Re: phy pap 1 here
« Reply #768 on: June 09, 2009, 06:05:04 pm »
Hey everyone!
Check this out : When we put our hands above a fire most of the heat gets tranferred by convection, while the energy from solar pannels mostly comes from radiation, so how come?
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Offline Ghost Of Highbury

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Re: phy pap 1 here
« Reply #769 on: June 09, 2009, 06:07:13 pm »
true ... heat tranferred from the sun by radiation
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Offline godfather93

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Re: phy pap 1 here
« Reply #770 on: June 09, 2009, 06:08:14 pm »
heat from a fire heats our hands mostly by convection (and some radiation) because the heat produced directly heats the air above (for a lot of radiation to happen the nucleus of the atoms must be affected greatly as well). Whereas in solar panels, it is absorbing radiation, so naturally it will also reflect radiation (some convection takes place as well)

@adi - wow! ur rep is shooting up everyday. let me help u! +rep! :D
« Last Edit: June 09, 2009, 06:11:19 pm by godfather93 »
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Offline Clem

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Re: Physics Help HERE ONLY !!
« Reply #771 on: June 09, 2009, 06:09:29 pm »
Hey does anyone know why we get most of the heat by convection when we put our hands above a fire and solar pannels get most of the heat by radiation?
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Offline Ghost Of Highbury

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Re: phy pap 1 here
« Reply #772 on: June 09, 2009, 06:09:50 pm »
hey hii godfather
long time no c...
how are you??
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Offline theigstudent

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Re: phy pap 1 here
« Reply #773 on: June 09, 2009, 06:10:20 pm »
oh Thanks
4 the answer
i mean wat is the threshold 4 the pap1
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Offline godfather93

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Re: phy pap 1 here
« Reply #774 on: June 09, 2009, 06:13:43 pm »
Quote from: eddie_adi619 on June 09, 2009, 06:09:50 pm
hey hii godfather
long time no c...
how are you??

hey adi! the problem was with my internet, the whole connection was down for 2 days. I'm doing fine (not gonna be soon).
Hows things over there?
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Offline Ghost Of Highbury

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Re: phy pap 1 here
« Reply #775 on: June 09, 2009, 06:14:33 pm »
its awesome out here
school started
best of luck for ur exam  :)
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Offline godfather93

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Re: phy pap 1 here
« Reply #776 on: June 09, 2009, 06:15:47 pm »
Quote from: eddie_adi619 on June 09, 2009, 06:14:33 pm
its awesome out here
school started
best of luck for ur exam  :)

thanks for the wishes! when exactly did u have ur summer vacation and for the students doing igcse, don't they get vacation?
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Offline Ghost Of Highbury

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Re: Physics Help HERE ONLY !!
« Reply #777 on: June 09, 2009, 06:17:03 pm »
the fire heats up the air above the fire and thus transfers it to our hands by more of convection but less of radiation


whereas the heat transferred from the sun to the solar panels is majorly in the form of radiation ... because in outer space there r negligible air molecules to transfer the heat...


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Offline Ghost Of Highbury

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Re: phy pap 1 here
« Reply #778 on: June 09, 2009, 06:17:35 pm »
v r the first batch in our school..

our vaccations were till 8th of june../.
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Offline godfather93

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Re: phy pap 1 here
« Reply #779 on: June 09, 2009, 06:19:22 pm »
Quote from: eddie_adi619 on June 09, 2009, 06:17:35 pm
v r the first batch in our school..

our vaccations were till 8th of june../.

888 posts! u have vacation in batches? never heard of that before. y does school start so early there?
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