anonymous
  • anonymous
The speed of sound in the air is proportional to the square root of the absolute temperature. At 20 °C the speed of sound is 343 m/s. What is the speed of sound at –10 °C? (0 °C = 273 K).
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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chestercat
  • chestercat
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anonymous
  • anonymous
please, help
anonymous
  • anonymous
v=343*sqrt(263/293)
anonymous
  • anonymous
since they are proportional , then you'll have this:\[\left| T \right|/ speed \] so in this case: \[343/20 = \left| 10 \right|/ \] solve for S by cross multiplying and that's it ^_^

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anonymous
  • anonymous
343/20 = 10/S *
anonymous
  • anonymous
correct me if I'm wrong :)
anonymous
  • anonymous
the result is 324.966 m/s
anonymous
  • anonymous
i am thank you, leofy am very very fankful, sstarica is very good know alot than leofy, i thank you
anonymous
  • anonymous
soory for me enlish, i am from iran
anonymous
  • anonymous
most welcome ^_^, no it's okay, as long as we understand you then your english is perfect!
anonymous
  • anonymous
i father is has money, so he is working a chemist for a organisation, he teach me how to make boom, and like i like it
anonymous
  • anonymous
that's awesome, try not to create a nuclear bomb ^^" :D
anonymous
  • anonymous
he tels me to learn this english maths and these english books, he say it is good in future
anonymous
  • anonymous
no, i make asltrolite G
anonymous
  • anonymous
Astrolite G
anonymous
  • anonymous
yes, he's right :) good luck leofy!
anonymous
  • anonymous
thankyou, i am very happy that you help me iraq people, because i know amerikans dont like iraq people, my teacher told me in sckool
anonymous
  • anonymous
let s be the speed of light, and T the absolute temperature, then we have: s=k(sqrt(T)), where k is some constant we can find k: k=s/(sqrt(T)) => k=343/(20+273)=1.17 hence, the speed of air at -10°C is s=1.17(-10+273)=307.7m/s hopefully I am right :)
anonymous
  • anonymous
oh there is a mistake :( k=343/sqrt(20+273)=20.04 therefor s=20.04*sqrt(-10+273)=324.97m/s :)
anonymous
  • anonymous
hmmm, why complicate it? T and S are both proportional to each other :)
anonymous
  • anonymous
it doesn't matter what is k because it is constant and after simplifying it get omited.so let v' be new speed.v'/v=sqrt(T'/T) where T' is new temprture in kelvin. so the last result for v' is 324.966 m/s
anonymous
  • anonymous
it feels much better when it's more complicated, don't you agree? :)
anonymous
  • anonymous
guys guys, they are proportional why don't you just write down the following relationship: T1/ S1 = T2/S2 simple as that ^_^
anonymous
  • anonymous
if you can't explain it in a simpler way , then you yourself don't understand it- Albert Einstein ^_^
anonymous
  • anonymous
wow this is a good one for Albert Einstein, although I don't agree totally with him :P
anonymous
  • anonymous
you should, the simpler you explain it , the clearer you see the problem and the clearer the other person sees it too + the more organized. To solve a problem, we take each step at a time = this is called organization = simplicity :)
anonymous
  • anonymous
haha ok ok I agree
anonymous
  • anonymous
:) how great it is to find a simple solution for a complicated problem. This is life ^_^
anonymous
  • anonymous
:)
anonymous
  • anonymous
I think there is one little mistake in the formula you gave, that you consider S to be proportional to T, while it's proportional to its square. right?
anonymous
  • anonymous
square root*
anonymous
  • anonymous
true! I forgot abt it ^_^ so it'll be :\[\sqrt{T1}/\S1 =\sqrt{T2}/\S2\] ofcourse the absolute of both temperatures :)
anonymous
  • anonymous
sqrt|T1|/S1 = sqrt|T2|/S2 ^_^
anonymous
  • anonymous
thank you anwar :)
anonymous
  • anonymous
today is hapy day for my, my father tell my i can go to my one training for fightrs
anonymous
  • anonymous
yay, have fun! ^_^
anonymous
  • anonymous
loll.. today is my worst day.. just saying not like it would matter :) anyways, good for you leofy, go beat the crap out of them :P
anonymous
  • anonymous
leofy, you are from iraq and specifyed something about your father teaching you to make bombs, and in particular, ASTROLITE G!!! I have an idea that you ARE terrorist (at least your father is)
anonymous
  • anonymous
we dont need terrorists here
anonymous
  • anonymous
lol.. you are so logical :P
anonymous
  • anonymous
oh come on, he's doing that for the love of science angoo :) no need to call him that, that's mean
anonymous
  • anonymous
you know it's sarcasm right? :P
anonymous
  • anonymous
i dunno, is it? .-.
anonymous
  • anonymous
no, i googled up astrolite G, and my dear friend, that is NOT a science type of boom! see for your self
anonymous
  • anonymous
lol my reply was
anonymous
  • anonymous
http://en.wikipedia.org/wiki/Astrolite
anonymous
  • anonymous
well maybe it's used as some sort of weaponary tool for his country?
anonymous
  • anonymous
damn, half a glass of this stuff is enough to blow up a tank!!!
anonymous
  • anonymous
AND,millitary does not use it, because it is too dangerous
anonymous
  • anonymous
http://en.wikipedia.org/wiki/Astrolite see for yourself! I am telling you this is a terrorist kid!!!
anonymous
  • anonymous
c'mon, I would not even bother myself to check.. it's just your thoughts being effected and controlled by the media
anonymous
  • anonymous
see, that's the beauty of science in the field of chemistry ^_^
anonymous
  • anonymous
maybe they are just discovering new things or trying to create new things, you never know ?
anonymous
  • anonymous
ok, whatever, but if he learns maths and uses it to build bombs that will be used by suicide terrorists... I wash my hands
anonymous
  • anonymous
you're saying the beauty of science in everything sstarica.. and this is the beauty of being a scientist :)
anonymous
  • anonymous
oh come on, don't be s negatively charged angoo! I must feed you a dozen of protons to get you positive . He's just learning and he sounds like a nice guy. Maybe he's just trying out different things
anonymous
  • anonymous
so*
anonymous
  • anonymous
ok you wash your hands.. we will not hold you any responsibility about it. but make sure not to help him solve any problem
anonymous
  • anonymous
lol, come on. Have faith in ppl ^_^
anonymous
  • anonymous
how can you possibly trust yourselves without trusting one another?
anonymous
  • anonymous
hmm....ok, ok, sorry for being too harsh, i am sorry Leofy if you are reading this
anonymous
  • anonymous
^_^
anonymous
  • anonymous
are you serious "BecomeMyFan" btw? because if you're, I will never be a fan of yours. (angry face)
anonymous
  • anonymous
anwar >_>
anonymous
  • anonymous
i was just sarcastic and messing around =D LOL
anonymous
  • anonymous
LOL just kidding guys.. this argument really helped me change the mood I was in.
anonymous
  • anonymous
you sounded serious angoo ^^"....and you've made me open my big mouth
anonymous
  • anonymous
._. *dumbfounded*
anonymous
  • anonymous
^^"
anonymous
  • anonymous
you deserve an oscar then :P
anonymous
  • anonymous
ahahaha... ^^" seriously.
anonymous
  • anonymous
well, i am practising, because i want to be good at social hacking, so i gotta practice on ppl to manipulate their emotions and make them believe what i want them believe :)
anonymous
  • anonymous
you haven't manipulated MY emotions >_>
anonymous
  • anonymous
lol.. you know that you failed, right? :P
anonymous
  • anonymous
http://en.wikipedia.org/wiki/Social_engineering_%28security%29
anonymous
  • anonymous
yes, i am just starting out
anonymous
  • anonymous
._. good luck?
anonymous
  • anonymous
oh, and btw, Leofy is a fictionary character that I created
anonymous
  • anonymous
hahah I am good at it. I can help you get better
anonymous
  • anonymous
w...what >_>
anonymous
  • anonymous
wes, you heard me right
anonymous
  • anonymous
I feel like jumping out of a window right now
anonymous
  • anonymous
we give you a face (you will never know what that means).
anonymous
  • anonymous
gave*
anonymous
  • anonymous
we did?
anonymous
  • anonymous
yes
anonymous
  • anonymous
._. ...
anonymous
  • anonymous
didn't you?
anonymous
  • anonymous
^^"...don't remember
anonymous
  • anonymous
so, was i good at being Leofy, did he sound sincear, real?
anonymous
  • anonymous
lol
anonymous
  • anonymous
no
anonymous
  • anonymous
he sounded so innocent >_<
anonymous
  • anonymous
yeah
anonymous
  • anonymous
=D
anonymous
  • anonymous
anyways, gotta finish chapter 4 in data communications adios~ ^_^
anonymous
  • anonymous
guys, lets start a social engineering study group
anonymous
  • anonymous
he is so kind.. I believe he is reading what we are writing right now and he's like "what the hell is going on? :O"
anonymous
  • anonymous
good luck sstarica :)
anonymous
  • anonymous
thank you, good luck to you too guys ^_^
anonymous
  • anonymous
well, he will never be reasing this, because he was me
anonymous
  • anonymous
see you sunny
anonymous
  • anonymous
sunny? :D!
anonymous
  • anonymous
what? something wrong?
anonymous
  • anonymous
no ^_^, bye bye
anonymous
  • anonymous
bye, little canarie
anonymous
  • anonymous
kidding
anonymous
  • anonymous
seriously
anonymous
  • anonymous
LOL
anonymous
  • anonymous
=D

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