![]() Static fluids or fluids that aren't moving don't have any kinetic energy so we're left with only potential energy which is related to the height of the fluid and internal energy, which is related to the pressure. The only thing that affects the pressure is the depth, but why? You may have heard of Bernoulli's Principle which basically says that all fluids have energy and that energy can take one of three forms, kinetic, potential, or internal. In fact for a fluid that's not moving, or static, the volume or distribution of the water doesn't matter. Pause the video if you need to and try and think about if you put a gauge at each red dot which one would have the highest water pressure? Made a decision? The correct answer is the pressure at the bottom of each container is exactly the same because they all have the same depth. One is skinny, one's a bit wider, this one's kind of like a maze, this one is funnel shaped, and this one I call Tanky McTank Face. (upbeat music) - I've put together this drawing of a few different containers filled with water. ![]() ![]() Hey, I'm Grady, today on Practical Engineering we're talking about hydrostatics. Whether you're designing a water tower for a city or you just wanna understand how those upside-down pet bowls work you've gotta know how to relate the depth and pressure of a fluid. Engineers that work with fluids need a solid understanding of how they behave and there's one branch of fluid mechanics that plays a role in areas all across our lives.
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