a) A human eardrum typically has an area of around 50 mm2. If you dive down to t
ID: 2203424 • Letter: A
Question
a) A human eardrum typically has an area of around 50 mm2. If you dive down to the bottom of that diving well, what is the force (in newtons) on the outside of your eardrum from the water? For your eardrum not to rupture, that much force has to be balanced by other forces (air pressure in your inner ear, the ossicles that are connected to your eardrum, and the elastic properties of the eardrum itself).
b) When we talk about how pressure depends on depth, we normally are dealing with water or some other liquid. But gases are fluids too, just with much lower density than liquids. That lower density means that the pressure in the atmosphere (101.3 kPaat sea level,on average) does not change significantly over altitude differences of a few meters, but it does matter when considering greater height differences. When you ride an elevator up to the top of a tall building
Explanation / Answer
a) force = pressure x area = 3.58x10^4N/m^2 x area of eardrum)
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