# How long does sound take to go around Earth?

## How long does sound take to go around Earth?

In summary, the further out the orbit, the slower the satellite moves and the further it has to travel. This means that for roughly circular orbits, the greater the distance from Earth, the longer it takes. The same goes for highly elliptical orbits, if we use the mean distance.

The higher you are the further you have to travel, and the higher, the thinner and colder the air, which affects the speed of sound. At sea level, and at a constant 68 degrees temperature, the speed of sound is 767 miles per hour. Divide the circumference of the Earth by that to get your rough answer. At the equator that’s 24,901.461 miles.

5280 feet (1 mile) divide by 1125 feet per second (speed of sound) equals 4.7 seconds to go one mile. 25000 miles (circumference of earth at equator) multiplied by 4.7 gives 117500 seconds. Divide by 60 seconds/minute and then by 60 minutes/hour equals 32.6 hours.

To be more precise: The speed of light is 299792.458 km per second and the circumference of the Earth is 40075 km. The amount of time it takes light to travel 40075 km is 40075 / 299792.458 seconds which is about 0.1337 seconds.

That’s because snow absorbs sound, so when a fresh blanket of snow covers the landscape it absorbs many of the sound waves, making it seem quieter outside, according to AccuWeather. Those spaces absorb sound waves, creating a quieting effect over a blanket of snow.

If you count the number of seconds between the flash of lightning and the sound of thunder, and then divide by 5, you’ll get the distance in miles to the lightning: 5 seconds = 1 mile, 15 seconds = 3 miles, 0 seconds = very close. Keep in mind that you should be in a safe place while counting.

As you can see, the speed of sound changes depending on the temperature and the humidity; but if you want a round number, then something like 350 meters per second and 1,200 feet per second are reasonable numbers to use. So sound travels 1 kilometer in roughly 3 seconds and 1 mile in roughly 5 seconds.

No, it is not possible on moon for sound waves to travel.

It takes sound about 5 seconds to travel one mile.

8 minutes and 20 seconds
Divide these and you get 500 seconds, or 8 minutes and 20 seconds. This is an average number. Remember, the Earth follows an elliptical orbit around the Sun, ranging from 147 million to 152 million km.

Travelling at the speed of sound (766 miles or 1,233 kilometers per hour), it takes a noise about 4 hours to cover that distance.

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