Answer to Question #73866 in Physics for kubwimana olivier

Question

A person rides up a lift to a mountain top, but the
person’s ears fail to “pop”. The radius of each
ear drum is 0.40 cm. The pressure of the
atmosphere drops from 10.10 x 105 Pa at the
bottom to 0.998 x 105 Pa at the top.
 What is the pressure difference between the inner and
outer ear at the top of the mountain?
 What is the magnitude of the net force on each
eardrum?