Fundamental frequency and temperature

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Homework Help Overview

The discussion revolves around the relationship between temperature and the fundamental frequency of sound produced by organ pipes, specifically how changes in air temperature affect sound properties. The subject area includes concepts of sound waves, frequency, wavelength, and the speed of sound.

Discussion Character

  • Exploratory, Conceptual clarification, Mathematical reasoning, Assumption checking

Approaches and Questions Raised

  • Participants explore how temperature influences the fundamental frequency of organ pipes, questioning the relationship between frequency, wavelength, and speed of sound. Some express uncertainty about whether changes in air density due to temperature affect sound propagation, while others discuss the implications of the speed of sound increasing with temperature.

Discussion Status

There is a mix of exploratory questions and clarifications regarding the principles of sound waves and their behavior in relation to temperature. Some participants have provided insights into the relationships between frequency, wavelength, and speed, suggesting that frequency increases with rising temperature, although not all aspects are fully resolved.

Contextual Notes

Participants are considering the effects of temperature changes on the physical properties of organ pipes and the sound they produce, including the potential minimal changes in pipe length and the implications for sound frequency. There is an acknowledgment of the complexity involved in understanding these relationships.

tanzerino
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1. Balboa Park in San Diego has an outdoor organ. When the air temperature increases, the fundamental frequency of one of the organ pipes _____.

a) goes down
b) stays the same
c) goes up
d) is impossible to determine




2. v=331sqrt(1+t/273)/



3. goes up?)
 
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How are the frequency, wavelength and speed of the sound wave related?

ehild
 
v=lamda x f.
however we know that in same medium velocity of propagation is constant but i don't know if that means less dense air due to heat means same medium.also we know that for any source of oscillation frequency is constant but there is not sound source here it is air blowing.If temperature goes up velcoity goes up if lamda is constant then frequency goes up but I am not sure.Any help in this mess.?
 
What is the "cause" of the sound wave having a frequency?
how much (%) do the organ pipes length change, if 10 degrees warmer?
 
The sound source is the organ pipe. The wavelength of the sound is determined by the length of the pipe. When it is blown, standing waves form in it, and the wavelength of the fundamental frequency is twice the pipe length of an open pipe and 4 times the length of a closed one. This length changes so little with increasing temperature, that you think the wavelength does not change as the temperature rises. The speed of sound does change, you have the formula for v: it rises. v and f are proportional: you are right, f goes up with the rising temperature.

ehild
 
Thanks for your help.:) i got it now"how v is proportional to f " through f=nv/2l.
Thanks for everyone.
 

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