Question

A fan at a rock concert is 50.0 m from the stage, and at this point the sound intensity level is 108dB. Sound is detected when a sound wave causes the tympanic membrane (the eardrum) to vibrate. Typically, the diameter of this membrane is about 8.40 mm in humans. Answer the following:

How much energy is transferred to her eardrums each second ?
How fast would a 2.00 mg mosquito have to fly to have this much kinetic energy?
How fast a typical 2.0 mg mosquito would have to fly (in mm/s) to have an amount of energy delivered to the eardrum each second when someone whispers (20 dB) a secret in your ear?

Answer 1

Based on your question the answer to this is the following and i hope i answered you question correctly:

How much energy is transferred to her eardrums each second ?
-6.31

How fast would a 2.00 mg mosquito have to fly to have this much kinetic energy?
-1.39*10^-5

How fast a typical 2.0 mg mosquito would have to fly (in mm/s) to have an amount of energy delivered to the eardrum each second when someone whispers (20 dB) a secret in your ear?
-3.5 joules