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There are several reasons why jet aircraft fly at high altitude, The main reason is that the air is much thinner, hence the aircraft needs to run the turbines at less power in order to maintain a speed, The less power you run the engines at, the less fuel you use. The other reasons include noise abatement and keeping out of the way of smaller air traffic such as helicopters and piston engined aircraft who are limited to the altitude they are capable of flying at.
Wiki User
∙ 10y ago
Wiki User
∙ 11y agoat high altitude, the air is thinner so there is less oxygen, so pilots wear an oxygen mask to get air to breath that is more dense and has the required pressure for humans to breath normally.
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(1)The temperature of Mercury is about 100 degree celcius.Generally the human body cannot bear such a high temperature. (2)Human body needs Oxygen to survive.It is an essential factor for our body. (3)Recently scientist have discovered that there is no Oxygen on planet Mercury.So ,thats why we have to wear Oxygen mask on Mercury.
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