The music video for John Legend 's single Everybody Knows has already been viewed 9,997 times since it was posted on Tuesday, January 20, 2009. The video belongs to the music genre of R&B.
hydration (Noun). the process of providing an adequate amount of water to body tissues. hydration (Noun). the chemical reaction by which a substance (such as cement) combines with water, giving off heat to form a crystalline structure in its setting and hardening.
Hydration pack. A hydration pack is a type of hydration system built as a backpack or waist pack containing a reservoir or bladder commonly made of rubber or flexible plastic.The reservoir contains a capped mouth for filling with liquid and a hose that allows the wearer to drink hands-free.he size of the reservoir can vary widely depending on brand and the purpose of the hydration pack. Some hydration packs are extremely small and minimalist, designed to add as little load as possible while running or cycling, while others are more suited for backpacking and extended hikes, equipped with huge bladders.