![Water striders are light (like ants) thus don’t “break” surface ,[object Object]](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)
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Surface tension
- 3. Even a piece of steel can do this trick if it is small (steel ~ 8x water)
- 12. OK so remember this? (steel ~ 8x water)
- 15. Incidentally – Scaling tie-in - Why droplets are droplet-sized - mass increases faster than length or area, so above about 1 cm diameter, water droplet mg > l, so more likely to get torn apart by its own weight
- 25. surface adhesion energy The water at this surface is at a lower potential energy than the bulk water, so deformations that increase this surface area are favorable and spontaneous