Question

Why do sound waves travel at different speeds in each gas of helium,air,and carbon dioxide.?

Answer 1

Click

Answer 2

Here are some practical examples relating to your question.

Answer 3

these dont seem to answer the question

Answer 4

thank you for the info though!

Answer 5

\(\color{#0cbb34}{\text{Originally Posted by}}\) @jennylove
these dont seem to answer the question
\(\color{#0cbb34}{\text{End of Quote}}\)

Which ones don't seem to answer the question? Mine or his? 🤔

Answer 6

His were just equations that didnt answer the questions. However for yours, it did not go into depth regrading gases. it went over more liquids and solids. It also did go into depth about how elasticity and density or even temperature play a factor. It is a great start but it didnt really help too much! Thank you though for providing this information

Answer 7

it also did not go into *

Answer 8

On the contrary, I believe his equations were supposed to help lead you to the result. We don't do direct answers on here

Answer 9

Of course he might have gone the wrong direction. I haven't opened whatever he shared

Answer 10

Recall that sound waves are mechanical, longitudinal waves, where the propagation of sound particles is dependent on the momentum of hitting other molecules. In other words, sound is produced by the vibration of surrounding molecules.

Hence, gaseous media with greater room mean square speeds can propagate sound more. Recall the formula for root mean square speed

\(υ_{rms}=\sqrt{\frac{3RT}{MM}}\)
We can assign any arbitrary unit for T, it doesn't matter. Take notice of the masses. Since M is on the bottom, we can say that M is inversely proportional to velocity, and hence kinetic energy, and finally sound speed.

If you look up the molar masses of He, Co2, and air (or use your periodic table), you will find that He<Air<CO2 in molar mass.

Since you know that molar mass is inversely proportional to KE, you can figure out the relation now

Answer 11

Kitty's reference is also pretty similar too, you could use that way as well

Answer 12

You may take a look yourself, however it did not provide any info regrading density,temperature,or elasticity for his equations. It was simply equations, but I was having difficultly knowing how these equations are used and what they specifically provide.

Answer 13

I havent reviewed chemistry in quite awhile, would the molar mass play a factor in the density? @justjm

Answer 14

I did say there was the possibility he might not have applied the correct content as I had not seen it. However, his intent was to help you find the answer instead of just pasting it into chat.

He does seem like a new user, but give him credit for trying.

Answer 15

Also, thank you @justjm for the mention

Answer 16

\(\color{#0cbb34}{\text{Originally Posted by}}\) @jennylove
I havent reviewed chemistry in quite awhile, would the molar mass play a factor in the density? @justjm
\(\color{#0cbb34}{\text{End of Quote}}\)
I'm just using the root mean-square speed formula to hint that mass is inversely proportional to the speed of a sound wave in a gaseous media

I'm using molar mass here because elements are being used. You can relate density to this as well. Remember p=m/v, and I'm letting v be arbitary, so p is proportional to m; density is proportional to mass. Density can be related to speed just as mass.

Answer 17

I appreciate both his and your help as to why i have thanked you. However, I thought we were supposed to rate the best answer not who answers first. I didn't feel like that helped me, but i will give him the star for effort. (:

Answer 18

Is it possible to give multiple stars?

Answer 19

I would like to give you guys all three stars

Answer 20

\(\color{#0cbb34}{\text{Originally Posted by}}\) @jennylove
Is it possible to give multiple stars?
\(\color{#0cbb34}{\text{End of Quote}}\)
I'm afraid not, but you can go ahead and give them the stars (: You've given me a few before, give them a few! (:

Answer 21

If you are referring to the other user, it is true that he did not contribute much though at least he made some effort.

However, jm did say my response constituted an alternative method to answering your query.

Answer 22

Anyway, I have already given jm a medal for the detailed response

Answer 23

Aw, I wish that was possible or else I would give you guys all stars!

Answer 24

I have gave you the star @kittybasil

Answer 25

Only give medals (not stars!) to people who have answered at least part of your query. Effort is appreciated, but ultimately it's pointless if that effort does not do anything towards actually answering the question

Answer 26

Thank you

Answer 27

how do you give medals?

Answer 28

same thing lol

Answer 29

Medals is what you meant by "stars" :)

Answer 30

Oh okay, yeah i prefer stars since there is a star next to it!

Answer 31

and of course (:!

Answer 32

But if you say "star" nobody will understand :p

Answer 33

Didnt you? and @justjm

Answer 34

Only because we were here to witness it :)

Answer 35

If they dont understand ,I will be glad to explain (:

Answer 36

It's better to use colloquial terms ^^'

Answer 37

However, there wasnt anything to "witness". I still used the same word lol

Answer 38

The term carried over from the precursor site, so people are familiar with 'medal' more!

Answer 39

Oh awesome, thanks for the info!

Answer 40

:)