# Question: What is the speed of sound in mph?

## What are the Mach speeds?

Classification of Mach regimes

Regime Flight speed
( Mach ) (mph)
Transonic 0.8–1.2 609–914
Supersonic 1.2–5.0 915-3,806
Hypersonic 5.0–10.0 3,806–7,680

## What is the speed of sound at 35000 feet?

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

## How fast is Mach 1 at sea level?

Supersonic speed is the speed of an object that exceeds the speed of sound (Mach 1). For objects traveling in dry air of a temperature of 20 °C (68 °F) at sea level, this speed is approximately 343.2 m/s (1,126 ft/s; 768 mph; 667.1 kn; 1,236 km/h).

## At what speed do you break the sound barrier?

The moment an aircraft’s speed exceeds the speed of sound, it is said to have broken the sound barrier. 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.

## Is a jet faster than a bullet?

The U.S. military is reportedly developing a hypersonic jet plane that could soar at up to five times the speed of sound — faster than a bullet, which generally travels at Mach 2, or twice the speed of sound.

## What is the fastest jet in the world?

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.

You might be interested:  Often asked: How many ounces in a small can of crushed pineapple?

## Do planes fly over Everest?

According Debapriyo, most commercial airlines avoid flying directly over the Himalayas. This is because “the Himalayas have mountains higher than 20,000 feet, including Mt Everest standing at 29,035 feet. However, most commercial airplanes can fly at 30,000 feet.” The Himalayan region has almost no flat surfaces.

## Can a 747 break the sound barrier?

As it shot across the Atlantic, the Boeing 747 -400 jet reached a top ground speed of 825 mph. However, the jet did not actually break the sound barrier, because that is measured by its airspeed, or the speed of the plane relative to the air through which it is traveling.

## Why do planes fly at 38000 feet?

The biggest reason for this altitude lies with fuel efficiency. The thin air creates less drag on the aircraft, which means the plane can use less fuel in order to maintain speed. Less wind resistance, more power, less effort, so to speak. Spending less on fuel is also great for airlines, for obvious reasons.

## How fast is Hyper Sonic?

For aircraft speeds which are much greater than the speed of sound, the aircraft is said to be hypersonic. Typical speeds for hypersonic aircraft are greater than 3000 mph and Mach number M greater than five, M > 5.

## Is Mach 20 faster than the speed of light?

1 Speed of Light in Vacuum: In SI units the speed of light measured in a vacuum is 299,792,458 meters per second. Please share if you found this tool useful:

Conversions Table
20 Light Speed to Mach Number = 17619821.7991 900 Light Speed to Mach Number = 792891980.9574
You might be interested:  FAQ: How many frames can the human eye see?

## Has a car broken the sound barrier?

Thrust SSC holds the world land speed record, set on 15 October 1997, when it achieved a speed of 1,228 km/h (763 mph) and became the first land vehicle to officially break the sound barrier.

## Why is it illegal to break the sound barrier?

We know it as a “sonic boom” for the explosive noise that can be heard when it reaches the ground. In 1973 the U.S. outlawed civil supersonic flights over land for fear that sonic booms posed too great of a public nuisance.

## How many mph is a Mach?

Mach to Miles per hour table

Mach Miles per hour
1 Mach 761.21 mph
2 Mach 1522.41 mph
3 Mach 2283.62 mph
4 Mach 3044.83 mph

## Does a bullet break the sound barrier?

Bullets break the sound barrier with boring regularity. The speed of sound is roughly 1125 feet per second at standard temperature and pressure (sea level). Even bullets from guns chambered in. 22lr, a relatively low powered cartridge, break the sound barrier with common ammunition loadings.