Why do cellphone waterproof ratings have a time limit? Example 6 meters for 30 minutes.
In: 54
Water molecules are pushed by other water molecules into spaces where there are less water molecules, i.e. inside the phone. The seals on the phone can push back these water molecules for a while. It’s like wrestling with a guy stronger than you. You can hold him back for a time but eventually you’re gonna get pushed backwards. The water pressure will eventually break the seals allowing water in. The metres part determines how much the water molecules are pushing against the seals.
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