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Answer to Question #2273 in Mechanics | Relativity for bongy

Question #2273
You are viewing a New Year's Day fireworks display at a distance of 1500 m. It is 4.0°C. How long does it take the sound of the fireworks exploding to reach you? answer in seconds.
Expert's answer
The speed of sound at 4.0°C in the dry air can be derived by the formula:

/cgi-bin/mimetex.cgi?c_%7B%5Cmathrm%7Bair%7D%7D%20=%20331.3%20%5Cmathrm%7Bm%20%5Ccdot%20s%5E%7B-1%7D%7D%20%5Csqrt%7B1+%5Cfrac%7B4%7D%7B273.15%5C;%5E%7B%5Ccirc%7D%5Cmathrm%7BC%7D%7D%7D%20=%20333.72%20m/s
t = s/cair = 1500/333.72 = 4.94 s

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