usually there ears
Fighter pilots don't use sound to communicate, they use radios, and radio waves travel far faster than any plane to date, so there is no trouble communicating.
Pilots use mostly electronic equipment. If electronics go out they use instruments.
As pilots get closer to the speed of sound, the air resistance they experience increases significantly. This can lead to an effect known as "transonic buffeting" where the airflow over the aircraft becomes turbulent. Pilots must carefully control their speed and altitude to manage these effects and prevent loss of control of the aircraft.
Yep.
no o
pilots use barometers because they don't want to crash because of the air pressure might be high
Sure. Air Force pilots do it fairly frequently.
For navigational purposes
luggage works
Yes. Pilots use coordinate grids to map out their destinations. Air travel managers also use grids to track planes coming in and out of the airport.
Negative.
luggage works