What is the speed of sound at 30 000 feet?
The speed of sound (Mach 1) varies with altitude and temperature. If an aircraft is travelling at the speed of sound at sea-level then its speed will be 661 knots (760 miles per hour) or if it is travelling at the speed of sound at 30,000 feet then its speed will be 589 knots (677 miles per hour).
What is the speed of sound at 40 000 feet?
Speed of Sound at a known temperature and density of air
| Altitude | Speed of Sound | |
|---|---|---|
| Feet (ft) | Meter (m) | mph |
| 30,000 | 9144 | 678.1 |
| 35,000 | 10668 | 660.7 |
| 40,000 | 12192 | 659.8 |
What is the speed of sound at 20 000 feet?
660 miles per hour
At 20,000 feet (6,096 meters), the speed of sound is 660 miles per hour (1,062 kilometers per hour). If an aircraft is traveling at one half the speed of sound, it is said to be traveling at Mach 0.5.
What is the speed of sound at 80000 feet?
A Mach number is just a multiple of the speed of sound, which can vary. Mach 2, or twice the speed of sound, is over 1500 miles an hour at Earth’s surface, but it’s only around 1300 in the cold air at 80,000 feet.
What is the speed of sound at 85000 feet?
The SR-71 cruised at Mach 3.2, more than 2,000 mph, around 85,000 feet.
What is the speed of sound at 8000 feet?
Altitude and speed of sound, temperature and pressure.
| Elevation | Speed of Sound | |
|---|---|---|
| 8000 | 26247 | 308.1 |
| 8500 | 27887 | 305.9 |
| 9000 | 29528 | 303.8 |
Is Mach 2 twice as fast as Mach 1?
Actually, the speed of sound is defined as Mach 1. So yes, Mach 2 is twice a fast.
What is the speed of sound at 4500 feet?
Altitude and speed of sound, temperature and pressure.
| Elevation | Speed of Sound | |
|---|---|---|
| 4500 | 14764 | 322.6 |
| 5000 | 16404 | 320.5 |
| 5500 | 18045 | 318.5 |