Explain Bernoulli's principle with visually appealing diagrams to a grade 11 kid

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Welcome to our exploration of Bernoulli's principle! This fundamental concept in fluid dynamics states that as the speed of a fluid increases, the pressure within that fluid decreases. Let's visualize this with a pipe that narrows in the middle. In the wider sections, the fluid moves slower and has higher pressure. But when the pipe narrows, the fluid must speed up to maintain the same flow rate, causing the pressure to drop. This relationship between speed and pressure is key to understanding many phenomena in our world. Now, let's see how Bernoulli's principle explains how airplanes fly! Airplane wings have a special shape - curved on top and flatter on the bottom. When air flows around the wing, it must travel a longer distance over the curved top than under the flatter bottom in the same amount of time. This means the air moves faster over the top of the wing. According to Bernoulli's principle, faster-moving air creates lower pressure, while the slower-moving air underneath creates higher pressure. This pressure difference generates an upward force called lift, which is what keeps the airplane in the air. This elegant application of fluid dynamics is what allows massive aircraft to defy gravity!