Question

help me in this problem about sound please

Answer 1

Ok, lets do a first, did you attempt it?

Answer 2

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

Answer 3

Hey, are you there?

Answer 4

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

Answer 5

Hey, did you try the problem?

Answer 6

hey, I don't know what equation i have to use . :(

Answer 7

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

Answer 8

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

Answer 9

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.

Answer 10

Yes exactly @Michele_Laino haha!

Answer 11

:) @Astrophysics we gave the answer at the same time

Answer 12

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!

Answer 13

yes! you are right!

Answer 14

:)

Answer 15

@baad1994

Answer 16

thank you guys @Michele_Laino @Astrophysics .. i really appreciate your help.

Answer 17

Np :)