How to find energy of sound wave

AI Thread Summary
In the discussion about determining the energy of sound waves, the focus is on comparing three options based on their wavelength and frequency. The key equation mentioned is v = f x lambda, which relates wave speed, frequency, and wavelength. The participant calculates the frequency for option C as 1633 Hz, indicating that higher frequency correlates with greater energy. There is confusion regarding the term "on" in option A, which hinders a complete analysis. Ultimately, the conclusion is that either option A or C is likely to have the greatest energy, with a preference for C based on the frequency calculation.
MySecretAlias
Messages
6
Reaction score
0

Homework Statement


In room temperature air, which of the following sound waves would have the greatest energy associated with it?

A. A wave with lambda equal to 4.7 on
B. A wave with a frequency of 2.6 Hz
C. A wave which has a distance between adjacent nodes (1/2lambda) of 21mm


Homework Equations


v = f x lambda ?
maybe KE = 1/2mv^2 and PE = PGH?
no idea.


The Attempt at a Solution


I'm not exactly sure what an "on" is (referring to letter A, unless that's supposed to be inches? not sure).

A =
?
B = 2.6 Hz
already stated
C = 1633Hz, so above B.
343 = f x .021
343/.21 = 1633Hz
I know higher frequency = higher energy.. so I know The answer is either A or C. Since I don't know what an "on" is, I'm having trouble solving for it. Thanks.
 
Physics news on Phys.org
I'm so confused :*(
 

Thread 'Errors and significant figures'

I multiplied the values first without the error limit. Got 19.38. rounded it off to 2 significant figures since the given data has 2 significant figures. So = 19. For error I used the above formula. It comes out about 1.48. Now my question is. Should I write the answer as 19±1.5 (rounding 1.48 to 2 significant figures) OR should I write it as 19±1. So in short, should the error have same number of significant figures as the mean value or should it have the same number of decimal places as...
View full post »
Thread 'A cylinder connected to a hanging mass'

Thread 'A cylinder connected to a hanging mass'

Let's declare that for the cylinder, mass = M = 10 kg Radius = R = 4 m For the wall and the floor, Friction coeff = ##\mu## = 0.5 For the hanging mass, mass = m = 11 kg First, we divide the force according to their respective plane (x and y thing, correct me if I'm wrong) and according to which, cylinder or the hanging mass, they're working on. Force on the hanging mass $$mg - T = ma$$ Force(Cylinder) on y $$N_f + f_w - Mg = 0$$ Force(Cylinder) on x $$T + f_f - N_w = Ma$$ There's also...
View full post »

Similar threads

Audio interference of sound waves from two speakers
Replies
19
Views
4K
Sound Wave Interference and Finding the Path Differences with Diagrams
Replies
20
Views
5K
Frequency of Reflected Underwater Sound Wave
Replies
2
Views
2K
Calculating frequency of the second harmonic
Replies
2
Views
2K
Physics behind the sound of guitars
Replies
23
Views
3K
How to solve this sound problem (minimum sampling rate required)
Replies
3
Views
2K
Sound Wave Problem: Frequency of Note in Amphitheater
Replies
6
Views
7K
Frequency for resonance to occur
Replies
33
Views
3K
The longitudinal displacement of sound wave
Replies
1
Views
4K
I Need to Calculate the Speed of Sound for a Lab
Replies
4
Views
2K

Hot Threads

Recent Insights

Back
Top