# What is the speed of sound at 30000 ft and?

## What is the speed of sound at 30000 ft and?

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 in mph at 35000 feet?**

about 660 mph

At 35,000 feet, the cruising altitude of a typical passenger jet, sound travels at about 660 mph (1,062 kmph).

**What is the speed of sound at 85000 feet?**

Hypersonic applies to speeds above Mach 5, or five times the speed of sound. The SR-71 cruised at Mach 3.2, more than 2,000 mph, around 85,000 feet.

### What is the sound barrier at 30000 ft?

The speed of sound is not a constant, but depends on altitude (or actually the temperature at that altitude). A plane flying Mach 1.0 at sea level is flying about 1225 km/h (661 Knots, 761 mph), a plane flying Mach 1.0 at 30000 ft is flying 1091 km/h (589 knots, 678 mph) etc.

**What’s the fastest plane speed?**

The Lockheed SR-71 Blackbird is the fastest jet aircraft in the world, reaching speeds of Mach 3.3–that’s more than 3,500 kph (2,100 mph) and almost four times as fast as the average cruising speed of a commercial airliner. Key elements of the SR-71’s design made this possible.

**How many mph does it take to break the sound barrier?**

approximately 770 mph

At what speed do you break the sound barrier? The speed at which you break the sound barrier depends on many conditions, including weather and altitude. It’s approximately 770 mph or 1,239 kmh at sea level.

## Do bullets break the sound barrier?

338 calibers, the bullets will travel at low enough velocities to avoid breaking the sound barrier, thus creating no “crack” noise. For one, to keep a bullet from breaking the sound barrier – 1,100 feet per second at sea level – requires several trade-offs at higher calibers.

**What is the speed of a plane at 30000 ft?**

Knots, 761 mph), a plane flying Mach 1.0 at 30000 ft is flying 1091 km/h (589 knots, 678 mph) etc. Speeds below Mach 1 are called subsonic, between Mach 0.8-1.2 Transonic and above Mach 1.2 Supersonic. ©1996-2011 Fighter Planes and Military Aircraft

**How many miles per second is the speed of sound?**

You can study how the disturbances are transmitted with an interactive sound wave simulator. If we consider the atmosphere on a standard day at sea level static conditions, the speed of sound is about 761 mph, or 1100 feet/second.

### Which is faster the speed of sound or the altitude?

SPEED OF SOUND AT DIFFERENT ALTITUDES. Mach 1.0 is the speed of sound in air, so a plane flying Mach 2.0 is flying twice as fast as the speed of sound. The speed of sound is not a constant, but depends on altitude (or actually the temperature at that altitude). A plane flying Mach 1.0 at sea level is flying about 1225 km/h (661 Knots, 761 mph),…

**What is the formula to calculate the speed of sound?**

The speed of sound depends on several variables, but the only independent variable we need to calculate the speed of sound is the temperature of the air. What is the formula to calculate the speed of sound?