Final answer:
The question deals with the fundamental frequency of a tube closed at one end in relation to the air temperature. Determining the frequency at a different temperature requires specific formulae or data that links temperature to the speed of sound, which is not provided in the question.
Step-by-step explanation:
The subject matter of the question is acoustics, specifically the resonance of air in tubes closed at one end (such as organ pipes or voice passages) and how this is affected by the temperature of the air. To find the fundamental frequency of a tube closed at one end, one can use the formula for the fundamental mode of vibration, which takes into account the speed of sound in air at the given temperature, and the length of the tube. In this particular case, we are asked to determine the fundamental frequency at a different air temperature from 16.0 ºC, given that the fundamental frequency is 449 Hz at the initial condition.
However, detailed information or a formula linking temperature and frequency change is not provided in the snippets of the question. Without the exact formula or the necessary data, it is impossible to determine the accurate fundamental frequency at a different temperature. Normally, the speed of sound in air tends to increase with temperature, affecting the wavelength and frequency of the sound in the tube, but without specific details, we cannot calculate the exact change in frequency.