Convert 104° F to the Celsius scale.

Explanation

The outer ear called pinna collects the sound from the surroundings. The sound passes through the auditory canal at the end of which is a thin membrane called the eardrum (or tympanic membrane). When the compression of the medium reaches the eardrum the pressure on the outside of the membrane increases and forces the cardrum inward. The eardrum moves outward when a rarefaction reaches it. Thus the cardrum vibrates. The vibrations are amplified several times by the three bones in the middle ear. The middle ear transmits the amplified pressure variations received from the sound waves to the inner ear. The pressure variation are turned into electrical signals by cochlea in the inner car.These electric signals are sent to the brain via the auditory nerves. The brain interprets them as sound.