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Speed of Sound
The speed remains constant until 82,000 ft, when it increases linearly to 1215 km/hr (755 mph, 656 kts) at 154,000 ft.
SPEED OF SOUND IN VARIOUS MEDIUMS |
|
SUBSTANCE |
SPEED (ft/sec) |
|
Vacuum |
Zero |
|
Air |
1,100 |
|
Fresh Water |
4,700 |
|
Salt Water |
4,900 |
|
Glass |
14,800 |
|
Steel |
20,000 |
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