## anonymous 5 years ago 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).

1. anonymous

2. anonymous

v=343*sqrt(263/293)

3. 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 ^_^

4. anonymous

343/20 = 10/S *

5. anonymous

correct me if I'm wrong :)

6. anonymous

the result is 324.966 m/s

7. anonymous

i am thank you, leofy am very very fankful, sstarica is very good know alot than leofy, i thank you

8. anonymous

soory for me enlish, i am from iran

9. anonymous

most welcome ^_^, no it's okay, as long as we understand you then your english is perfect!

10. 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

11. anonymous

that's awesome, try not to create a nuclear bomb ^^" :D

12. anonymous

he tels me to learn this english maths and these english books, he say it is good in future

13. anonymous

no, i make asltrolite G

14. anonymous

Astrolite G

15. anonymous

yes, he's right :) good luck leofy!

16. 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

17. 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 :)

18. anonymous

oh there is a mistake :( k=343/sqrt(20+273)=20.04 therefor s=20.04*sqrt(-10+273)=324.97m/s :)

19. anonymous

hmmm, why complicate it? T and S are both proportional to each other :)

20. 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

21. anonymous

it feels much better when it's more complicated, don't you agree? :)

22. anonymous

guys guys, they are proportional why don't you just write down the following relationship: T1/ S1 = T2/S2 simple as that ^_^

23. anonymous

if you can't explain it in a simpler way , then you yourself don't understand it- Albert Einstein ^_^

24. anonymous

wow this is a good one for Albert Einstein, although I don't agree totally with him :P

25. 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 :)

26. anonymous

haha ok ok I agree

27. anonymous

:) how great it is to find a simple solution for a complicated problem. This is life ^_^

28. anonymous

:)

29. 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?

30. anonymous

square root*

31. anonymous

true! I forgot abt it ^_^ so it'll be :$\sqrt{T1}/\S1 =\sqrt{T2}/\S2$ ofcourse the absolute of both temperatures :)

32. anonymous

sqrt|T1|/S1 = sqrt|T2|/S2 ^_^

33. anonymous

thank you anwar :)

34. anonymous

today is hapy day for my, my father tell my i can go to my one training for fightrs

35. anonymous

yay, have fun! ^_^

36. 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

37. 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)

38. anonymous

we dont need terrorists here

39. anonymous

lol.. you are so logical :P

40. anonymous

oh come on, he's doing that for the love of science angoo :) no need to call him that, that's mean

41. anonymous

you know it's sarcasm right? :P

42. anonymous

i dunno, is it? .-.

43. anonymous

no, i googled up astrolite G, and my dear friend, that is NOT a science type of boom! see for your self

44. anonymous

45. anonymous
46. anonymous

well maybe it's used as some sort of weaponary tool for his country?

47. anonymous

damn, half a glass of this stuff is enough to blow up a tank!!!

48. anonymous

AND,millitary does not use it, because it is too dangerous

49. anonymous

http://en.wikipedia.org/wiki/Astrolite see for yourself! I am telling you this is a terrorist kid!!!

50. anonymous

c'mon, I would not even bother myself to check.. it's just your thoughts being effected and controlled by the media

51. anonymous

see, that's the beauty of science in the field of chemistry ^_^

52. anonymous

maybe they are just discovering new things or trying to create new things, you never know ?

53. 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

54. anonymous

you're saying the beauty of science in everything sstarica.. and this is the beauty of being a scientist :)

55. 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

56. anonymous

so*

57. 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

58. anonymous

lol, come on. Have faith in ppl ^_^

59. anonymous

how can you possibly trust yourselves without trusting one another?

60. anonymous

hmm....ok, ok, sorry for being too harsh, i am sorry Leofy if you are reading this

61. anonymous

^_^

62. anonymous

are you serious "BecomeMyFan" btw? because if you're, I will never be a fan of yours. (angry face)

63. anonymous

anwar >_>

64. anonymous

i was just sarcastic and messing around =D LOL

65. anonymous

LOL just kidding guys.. this argument really helped me change the mood I was in.

66. anonymous

you sounded serious angoo ^^"....and you've made me open my big mouth

67. anonymous

._. *dumbfounded*

68. anonymous

^^"

69. anonymous

you deserve an oscar then :P

70. anonymous

ahahaha... ^^" seriously.

71. 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 :)

72. anonymous

you haven't manipulated MY emotions >_>

73. anonymous

lol.. you know that you failed, right? :P

74. anonymous
75. anonymous

yes, i am just starting out

76. anonymous

._. good luck?

77. anonymous

oh, and btw, Leofy is a fictionary character that I created

78. anonymous

hahah I am good at it. I can help you get better

79. anonymous

w...what >_>

80. anonymous

wes, you heard me right

81. anonymous

I feel like jumping out of a window right now

82. anonymous

we give you a face (you will never know what that means).

83. anonymous

gave*

84. anonymous

we did?

85. anonymous

yes

86. anonymous

._. ...

87. anonymous

didn't you?

88. anonymous

^^"...don't remember

89. anonymous

so, was i good at being Leofy, did he sound sincear, real?

90. anonymous

lol

91. anonymous

no

92. anonymous

he sounded so innocent >_<

93. anonymous

yeah

94. anonymous

=D

95. anonymous

anyways, gotta finish chapter 4 in data communications adios~ ^_^

96. anonymous

guys, lets start a social engineering study group

97. 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"

98. anonymous

good luck sstarica :)

99. anonymous

thank you, good luck to you too guys ^_^

100. anonymous

well, he will never be reasing this, because he was me

101. anonymous

see you sunny

102. anonymous

sunny? :D!

103. anonymous

what? something wrong?

104. anonymous

no ^_^, bye bye

105. anonymous

bye, little canarie

106. anonymous

kidding

107. anonymous

seriously

108. anonymous

LOL

109. anonymous

=D