A loon is a diving bird equally at home "flying" in the air or water. What swimming velocity under water will produce a dynamic pressure equal to that when it flies in the air at 35 mph?

The swimming velocity under water is 1.23 mph

Explanation:

dynamic pressure

where;

ρ is density of the fluid

v is the velocity of the fluid

ρw is the density of water = 1.94 slug/ft³

ρa is the density of air = 0.00238 slug/ft³

given velocity of air in mph = 35 mph, converting to ft/s is as follows

From this equation , we determine the swimming velocity under water.

in mph;

Therefore, the swimming velocity of the loon under water that will produce a dynamic pressure equal to that when it flies in the air is 1.23 mph

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