[Solved] Problem 2: Surface Tension vs Gravity. You have no doubt observed water droplets ‘hanging’ on a plate such as a piece of glass

Problem 2: Surface Tension vs Gravity. You have no doubt observed water droplets ‘hanging’ on a plate such as a piece of glass. The small water droplets seem to defy gravity and stick to the plate, even if turned upside down. The small drops adhere due to surface tension. The large drops fall due to gravity predominated over surface tension. Make a very rough, order-of-magnitude estimate of the how large in terms of diameter D) the water drop is before it falls, by finding the diameter of a spherical water drop such that the surface energy of the drop equals the change in gravitational potential energy of the drop falling a distance of one drop diameter. Acceleration due to gravity: 9 = 9.8 ms-The relevant surface energy y of water = 0.07 J-m2 Density of water is 1000 kg/mp. APE gravitational= m drop g Ah glass water D= Ah gravity

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Answer to Problem 2: Surface Tension vs Gravity. You have no doubt observed water droplets ‘hanging’ on a plate such as a piece of glass……