Friction occurs when objects move through water or air. Air resistance is a type of friction between air and another material. For example, when an aeroplane flies through the air, air particles ...

The best water resistance comes with a rating of 7 or higher — anything less means the phone can handle spray but not full immersion, Here are the best waterproof phones you can buy right now.

Save on a portable carpet cleaner, teeth whitening strips, a leather crossbody bag, Apple AirTags and more — up to 70% off. We're waving the flag for these steals: Apple AirPods Pro for a rare $80 off ...