6 ms·
Far less than 10%. During a heavy downpour, by volume, about one part in a million is liquid. In a cubic meter of heavily rain, there are only a few tens of rai
by nilstycho 2y ago
Far less than 10%. During a heavy downpour, by volume, about one part in a million is liquid. In a cubic meter of heavily rain, there are only a few tens of raindrops.
- naming_the_user 2y agoImagine if it were 10%, though. During the time it took for a droplet to fall 1 metre, you’d have 10cm of water on the floor. I reckon it’d feel quite heavy.
- ricardobeat 2y agoRain falls at 9m/s, so in a second you'd almost completely fill that space with 900 liters. For the immediate area around you, imagine an olympic pool of water falling roughly every second.
- ethbr1 2y agoAccording to NASA, terminal velocity for the largest droplets is ~10 m/s. Which seems oddly close (in magnitude) to Earth gravitational acceleration (9.8 m/s^2). Weird!
- deepsun 2y agoYep, but what matters for radar/lidar is the projection. I mean what percentage of 1 _square_ meter (not cubic meter) is occupied by droplet projections. Or, in radial terms, what percentage of "Solid angle" is occupied by rain droplets.