Prayers of healing to the Payne family. Water and air have similar properties. Bernoulli's principle originated in hydro dynamics and is used to explain flight. Pressure under an aircraft wing is greater than pressure over a wing, creating lift at the right speed. A speeding surfboard planes on the surface. Water hydro dynamically lifts a surfboard with speed. Speed creates higher pressure under the board so it planes on the surface. Modern surfing has introduced flight.
Water resists compression. Water is difficult to compress because of inter molecular hydrogen bonding. This is known as cohesion. Bonding of water molecules leaves little space between molecules. Without space, molecules cannot be compacted or squeezed together. Water molecules push back when high force is applied. When someone falls in water, they displace water by pushing it aside. As the person sinks, water moves out of his path. Sink rate or descent speed gradually