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anonymous

  • one year ago

help me in this problem about sound please

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  1. anonymous
    • one year ago
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  2. Astrophysics
    • one year ago
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    Ok, lets do a first, did you attempt it?

  3. Astrophysics
    • one year ago
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    \[T_{15} = 288.15 K~~~\text{and}~~~T_0 = 273.15K\] and you need to find \[\frac{ T_{15} }{ T_0 }\] at this point it's plug and chug

  4. Astrophysics
    • one year ago
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    Hey, are you there?

  5. anonymous
    • one year ago
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    hey! , I'm sorry for the delay.. I was studying :( . I think that nobody was going to answer me u_u . Are you there?

  6. Astrophysics
    • one year ago
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    Hey, did you try the problem?

  7. anonymous
    • one year ago
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    hey, I don't know what equation i have to use . :(

  8. Michele_Laino
    • one year ago
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    I think that we have to use this equation for the sound speed v_S: \[\Large {v_S} = \sqrt {\frac{{\gamma RT}}{M}} \] where R is the gas constant, \gamm is the ratio C_p/C_v between specific heats at constant pressure and volume, and M is the mass of a mole of our gas

  9. Michele_Laino
    • one year ago
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    so we can write: \[\Large \frac{{{v_S}\left( {{T_{15}}} \right)}}{{{v_S}\left( {{T_0}} \right)}} = \sqrt {\frac{{{T_{15}}}}{{{T_0}}}} = \sqrt {\frac{{288.15}}{{273.15}}} = ...\]

  10. Astrophysics
    • one year ago
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    We need to use \[v_{sound} = \sqrt{\frac{ \Gamma RT }{ M }}\] where gamma is a constant, R is gas constant, M is molecular mass of gas, and T is absolute temperature is what I can find as far as the second problem goes http://hyperphysics.phy-astr.gsu.edu/hbase/sound/souspe3.html for the third problem it seems we will need to know the doppler effect.

  11. Astrophysics
    • one year ago
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    Yes exactly @Michele_Laino haha!

  12. Michele_Laino
    • one year ago
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    :) @Astrophysics we gave the answer at the same time

  13. Astrophysics
    • one year ago
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    I was looking for the relationship as I could not recall it, but I knew it has to do with a gas constant from chemistry and it was the same one you seem to have used!

  14. Michele_Laino
    • one year ago
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    yes! you are right!

  15. Astrophysics
    • one year ago
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    :)

  16. Michele_Laino
    • one year ago
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    @baad1994

  17. anonymous
    • one year ago
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    thank you guys @Michele_Laino @Astrophysics .. i really appreciate your help.

  18. Astrophysics
    • one year ago
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    Np :)

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