Python Lists. Python has a great built-in list type named list. List literals are written within square brackets [ ]. Lists work similarly to strings -- use the len() function and square brackets [ ] to access data, with the first element at index 0.ython Lists. Python has a great built-in list type named list. List literals are written within square brackets [ ]. Lists work similarly to strings -- use the len() function and square brackets [ ] to access data, with the first element at index 0.
Normally, swallowing causes a little click or popping sound in the ear. This occurs because a small bubble of air has entered the middle ear, up from the back of the nose. It passes through the Eustachian tube, a membrane-lined tube about the size of a pencil lead that connects the back of the nose with the middle ear.
Ears popping due to change in altitude are the result of the pressure difference between the inside of our heads and the surrounding air. Pressure decreases with altitude, due to the reduction of the mass of overlying air with height. Pressure is c. 700 mbar at 3,000m; 500 mbar at 5,500m; 300 mbar at 10,000m.