In this video we explore how the special properties of water known as cohesion, adhesion, and surface tension affect the sport of rowing. Hydrogen bonds give water these special properties therefore if hydrogen bonds did not exist the sport of rowing would not be possible. First we discuss cohesion. Cohesion is the property of water that allows water molecules to stick together. This property creates an area for a rower to brace the blade of the oar against at the begin or "catch" of each stroke. As you can see in our pictures and video clips, the oar creates a mound of water as the rower takes each stroke, if the rower takes a truly effective stroke the water may even create a bend in the shaft of the oar. Next is adhesion. Adhesion is the property of water that allows the molecules to stick to other surfaces. This property works against rowers. If a rower does not retract their blade from the water cleanly the water will stick to the blade causing a disruption in the run of the boat. Lastly is surface tension. Surface tension allows the surface molecules of water to be attracted to each other creating a definite surface. This surface allows the boats to float on top and move smoothly and quickly along it. It is easy to see that rowing would be nonexistent without the special properties of water.
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