Can you hear a plane at 30 000 feet?

For example, the speed of sound at 30,000 feet is about 670 miles per hour, but an aircraft must travel at least 750 miles per hour (Mach 1.12, where Mach 1 equals the speed of sound) for a boom to be heard on the ground.

How far away can you hear an airplane?

I regularly hear aircraft passing overhead at FL360 or higher (approx. 6 nautical miles high), if I'm away from other sources of noise.

Can you breathe 30000 feet in the air?

Somewhere between 30,000 and 40,000 feet the pressure around you becomes far too low to push those oxygen molecules across the membranes in your lungs, and you get hypoxic (altitude sickness). If you try to breathe 100 percent oxygen above 40,000 feet for very long without a special type of mask, you'll die.

Can you see a plane at 30000 feet from the ground?

Other than the difficulty of seeing through 230 miles of atmosphere, not much. Unless your eye was literally at ground level, the aircraft would be above the horizon. Somewhere around 5 inches above the ground you'd be able to see past the horizon.

Can a prop plane fly at 30000 feet?

Turboprop engines are most efficient at speeds between 250 and 400 mph and altitudes between 18,000 and 30,000 feet. They also perform well at the slow speeds required for takeoff and landing and are fuel efficient.

Hero At 30,000 Feet | FULL EPISODE!

How long does it take a plane to reach 30000 feet?

Surely you know that airliners almost always fly at the same altitude, approximately 30,000 feet. After the take-off, it takes about 20 minutes to reach its cruising altitude.

What happens if a plane flies too high?

Aerodynamic altitude: If a commercial airliner flies too high, it will encounter less dense air passing over the wings to create lift. This can cause the plane to stall and fall out of control. Depending on the weather conditions and aircraft weight, this can occur anywhere between 40,000 and 45,000 feet.

What is the speed of sound at 30000 ft?

For example, the speed of sound at 30,000 feet is about 670 miles per hour, but an aircraft must travel at least 750 miles per hour (Mach 1.12, where Mach 1 equals the speed of sound) for a boom to be heard on the ground.

Do all planes fly at 30000 feet?

But generally, most commercial passenger jets cruise at between 32,000 and 40,000 feet—or six to seven-and-a-half miles off the ground. Turboprop planes, which are smaller aircraft that typically carry a handful of passengers, rather than hundreds, fly at a lower altitude of about 25,000 to 30,000 feet.

Why do jets fly at 30000 feet?

The reason planes cruise at high altitudes is that they burn less fuel and can fly faster, as the air is less dense. At 30,000 feet and higher, it is also possible for aircraft to avoid weather systems, making it more comfortable onboard.

At what altitude can you not breathe?

Death zone

It refers to altitudes above a certain point where the amount of oxygen is insufficient to sustain human life for an extended time span. This point is generally tagged as 8,000 m (26,000 ft, less than 356 millibars of atmospheric pressure).

Can a human survive at 35000 feet?

Airlines these days cruise at around 35,000 feet, some higher and some lower, but without protection at these altitudes a human being cannot survive.

At what elevation can you no longer breathe?

While 8000 feet (2500 meters) is considered the usual threshold altitude for HAI, some persons are more sensitive to lower oxygen levels and may become ill at altitudes of 5000 to 7000 feet (1500 to 2100 meters). It is usually possible to prevent HAI by ascending slowly and allowing your body to adjust as you go.

Can you hear a plane at 36000 feet?

Yes. Even at 30000 ft can be heard.

How loud is a plane at 1000 ft?

Car wash at 20 ft (89 dB); propeller plane flyover at 1000 ft (88 dB); diesel truck 40 mph at 50 ft (84 dB); diesel train at 45 mph at 100 ft (83 dB).

Can you hear a plane before you see it?

Simply put, the reason that you can see an airplane before you can hear it is just because light travels faster than sound. In air like our atmosphere, the speed of sound is about 330 meters/second (or about 740 miles/hour) but the speed of light is 300,000,000 meters/second (or about 186,000 miles/second).

Is there turbulence at 30000 feet?

About two-thirds of turbulence-related accidents happen at or above 30,000 feet. Every year in the U.S., almost 60 people are injured by turbulence due to not wearing their seat belts.

What is the air temp at 30 000 feet?

A: The standard temperature for 30,000 feet is -44.5C or -48F (Source: meteorologytraining.tpub.com/14269/css/14269_75.htm). All materials used in airplanes are designed and tested to withstand temperature extremes.

Is there turbulence at 35000 feet?

A major cause of turbulence at these upper levels is the jet stream. This fast-moving river of air often is concentrated between 30,000 and 35,000 ft above sea level. Wind speeds in the core of the jet stream can exceed 200 mph (320 kph) and may approach 300 mph (480 kph) in some cases.

What is the speed of sound at 35000 ft?

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

Do commercial planes break the sound barrier?

Flying faster than sound

Supersonic flight was first achieved in 1947 with a US military prototype Bell X-1 aircraft. It has since become common in military aircraft, but only the two commercial aircraft mentioned above have ever managed it.

Is it possible to go Mach 10?

Mach 10 speed has been achieved by aircraft in the past. On November 16, 2004, NASA launched the X-43A, an air-breathing hypersonic vehicle, and was able to reach real Mach 10 while being pushed into the atmosphere.

Can a plane accidentally fly into space?

Most Airplanes Need Air To Fly

Additionally, the jet engines of airplanes actually work by sucking air through them. All of this means that for almost all airplanes, space flight is impossible. You just can't take the air out of airplanes!

Can a plane stop in the air?

Can an airplane stay up in the air without moving forward just like helicopter? A: Techincally, there is only one way for the aircraft to remain hanging motionless in the air: if weight and lift cancel each other out perfectly, and at the same time thrust and drag cancel each other out too. But this is incredibly rare.