Question

a) If you dive to the bottom of a deep pool, your eardrums may get uncomfortable or even start to hurt. On the other hand, if you take an airplane flight, you may find your eardrums getting uncomfortable in a different way. Both experiences arise from pressure changes, but how do they differ? Explain in your own words.

b) Calculate the change in pressure your eardrums undergo when you dive to the bottom of a 4.85-m- deep swimming pool filled with saltwater (?? = 1 023 kg/m3). Answer to 3 SF, in Pa.

c) Assuming for the purposes of the question that the density of the atmosphere is a constant 1.22 kg/m3, calculate the altitude above ground level you'd have to fly to for your eardrums to undergo a pressure change of the same magnitude. Answer in km, to 3 SF.

d) Choose a specific type of spherical sports ball (no American footballs or rugby balls) and look up its radius and mass. Calculate the buoyant force the selected ball would experience if held just under the surface of a saltwater swimming pool. Also calculate the ratio FB/FG of the buoyant force to the gravitational force acting on the ball.

e) If the ball in (d) were then carried to the bottom of the pool, would the buoyant force acting on it increase, decrease, or remain constant? Explain without equations or further calculations.

Answer 1

Whe© We drve to dbe boltom of deep pool . Jhoe guud Colurnr mean