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21 September 2008, 03:40 PM | #1 |
"TRF" Member
Join Date: Jun 2008
Real Name: Art
Location: San Francisco
Watch: Sundial
Posts: 2,266
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Difference between air and water pressure
Rolexes are rated to be waterproof to a certain depth. What is the difference between air pressure and water pressure?
Let's say you have your Rolex serviced at a high elevation. At that point I would assume that the air pressure outside the watch and inside the watch is the same. Now you take the watch to sea level. If you have come down in elevation 7000 feet, why doesn't the watch implode? It must be different than taking the watch from sea level to 7000 feet under the water. Are the air molecules smaller than the water molecules, and thus the pressure inside the watch and outside the watch equalizes in air but not in water because the air molecules can enter or leave the watch to equalize pressure? Or something else?
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