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* Radius of a sphere with the same mass The Shape of Raindrops The common perception that raindrops are teardrop-shaped is wrong. <1mm* 2mm* (Breaks up into smaller drops) 3mm* >4.5mm* References Move the mouse pointer over each raindrop shape to see more details
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* Radius of a sphere with the same mass The Shape of Raindrops The common perception that raindrops are teardrop-shaped is wrong. <1mm* 2mm* In a small raindrop, the surface tension of water molecules is strong enough to pull the drop to form a sphere 3mm* >4.5mm* References
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* Radius of a sphere with the same mass The Shape of Raindrops The common perception that raindrops are teardrop-shaped is wrong. <1mm* 2mm* The larger the raindrop, the weaker the surface tension. As a larger raindrop falls faster, air pressure will build up at the bottom of the drop so that the bottom of the drop will be flattened, or even develop a depression. The pressure just above the drop (or called “wake”) is relatively lower so that the top portion of the drop is being “sucked” upwards. 3mm* >4.5mm* References HIGH PRESSURE HIGH PRESSURE LOW PRESSURE LOW PRESSURE Air flow
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* Radius of a sphere with the same mass The Shape of Raindrops The common perception that raindrops are teardrop-shaped is wrong. <1mm* 2mm* (Breaks up into smaller drops) When a drop is very large, the surface tension is completely overwhelmed and it can be blown inside out to form “a bag with an annular ring of water and then break up into smaller drops” (Fraser). 3mm* References >4.5mm*
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References Cramer, M.S. (2004). The Shape of Raindrops. Retrieved from http://www.fluidmech.net/ tutorials/raindrops/raindrop.htm Fraser, A.B. (n.d.). Bad Rain. Retrieved from http://www.ems.psu.edu/~fraser/Bad/BadRain.html Heidorn, K.C. (July 1, 2000). Weather Almanac for July 2000 - Raindrops, So Many Raindrops. Retrieved from http://www.islandnet.com/~see/weather/almanac/arc 2000/alm00jul.htm U.S. Geological Survey (September 14, 2005). Are raindrops shaped like teardrops? Retrieved from http://ga.water.usgs.gov/edu/raindropshape.html
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