# Quick Answer: How Cold Is It At 35000 Feet?

## At what height do you lose oxygen?

Atmospheric pressure and inspired oxygen pressure fall roughly linearly with altitude to be 50% of the sea level value at 5500 m and only 30% of the sea level value at 8900 m (the height of the summit of Everest)..

## What happens if a plane flies too high?

When the plane gets too high, there is insufficient oxygen to fuel the engines. “The air is less dense at altitude, so the engine can suck in less and less air per second as it goes higher and at some point the engine can no longer develop sufficient power to climb.” …

## Why are planes so cold?

Why is it kept so cold? Broadly speaking, it’s all about keeping the cabin pleasant. … This is because the air conditioning units on the aircraft are often turned off to save fuel before the plane is in the air, so the body heat of scores of people heats the cabin quickly.

## Can a human survive at 37000 feet?

Above 28,000 to 30,000 feet with extra oxygen under pressure — normal consciousness and life can be sustained to 50,000 feet. Above 50,000 feet with any form of oxygen — sustained human life is not possible without a pressure suit like astronauts wear.

## What happens if a plane flies into space?

If an airplane flies in space, it won’t be able to suck in fresh air with which to supply its engines, resulting in loss of propulsion. The bottom line is that airplanes can’t fly in space because there is no air in space. Airplanes rely on air to produce both lift and propulsion.

## How cold is it at 38000 feet?

How dangerous are the conditions? Very. At 38,000 feet — the cruising altitude of the Hawaiian Airlines flight that the FBI says the 15-year-old took Sunday — the outside air temperature is about minus 85 degrees. The air is so thin that a person will pass out because the brain is starved of oxygen.

## Do Planes fly over Mount Everest?

Airplanes often avoid air paths that take them over Mt Everest or the Pacific Ocean. … 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.”

## Why do aircraft fly at 35000 feet?

The “sweet spot” of flying is regarded as between 35,000 and 42,000 feet – too high and the oxygen becomes too sparse to fuel the engines, too low and the air resistance is greater. This optimum height is linked to the usual weight of a commercial jet – that is, heavier planes fly lower, and lighter higher.

## How cold is the air at 35000 feet?

How cold is it up there? The higher you get, the colder it gets, up until 40,000 feet. If the temperature at ground level was 20C, at 40,000 feet it would be -57C. At 35,000 feet the air temperature is about -54C.

## How cold is it at 40 000 feet?

Between 30,000 and 40,000 feet (9,000 and 12,000 m), the cruising altitude of most jet aircraft, air temperature ranges from -40° F to -70° F (-40° C to -57° C). Modern aircraft have sealed cabins and heaters to protect pilots and passengers from wind blast and cold air.

## Why do planes fly at 38000 feet?

Commercial aircraft typically fly between 31,000 and 38,000 feet — about 5.9 to 7.2 miles — high and usually reach their cruising altitudes in the first 10 minutes of a flight, according to Beckman. … Another reason why planes don’t fly higher is due to the weight of the aircraft.

## How much oxygen do you lose per 1000 feet?

Hypoxico Altitude To Oxygen ChartAltitude (Feet)Altitude (Meters)Effective Oxygen PercentageSea LevelSea Level20.9%1,00030420.1%2,00060919.4%3,00091418.6%27 more rows•May 28, 2018

## Can a plane fly at 60000 feet?

Question: What is the highest altitude an airplane can fly? Answer: The highest commercial airliner altitude was 60,000 feet by Concorde. The highest military air-breathing engine airplane was the SR-71 — about 90,000 feet. The highest airliner flying today reaches 45,000 feet.

## Why do pilots prefer to fly at 36000 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.

## Is there oxygen at 35000 feet?

Planes have lower oxygen levels If this didn’t happen, everyone inside the plane would die, as the low air pressure at the elevations planes fly (typically 35,000 feet or so) means there isn’t enough oxygen present for your body to function.

## Do planes eject toilet waste?

Some lavatory excrement had leaked out.” Do airplanes ever dump their waste while in flight? Not intentionally. … (The noise may make it seem like the toilet is flushing your waste out into the atmosphere, but it’s not.) Under normal circumstances, the ground crew disposes of the sewage after the plane lands.

## How high can you go before you need oxygen?

about 20,000 feetAn elevation of about 20,000 feet above sea level is the maximum height at which sufficient oxygen exists in the air to sustain us.

## Why do planes not fly over the Pacific?

The primary reason airplanes don’t fly over the Pacific Ocean is because curved routes are shorter than straight routes. Flat maps are somewhat confusing because the Earth itself isn’t flat. Rather, it’s spherical. As a result, straight routes don’t offer the shortest distance between two locations.