Drop's of rain

Drop's of rain
The decline in the rain drops are often represented in popular culture "in the form of tears" - will go to the base and reducing the top - but this is wrong. Only water droplets defoliant by some sources is in the form of tears in training. The small rain drops are almost spherical. Larger are always flat on the ground like bread hamburgers, very large, in the form of the parachutes. The shape of the drop was brisk by Philip Leonard in 1898. He found that small drops of rain (less than 2 mm in diameter) are nearly spherical. Because it is largely maintained (about 5 mm in diameter), they are in the form of doughnuts. After about 5 mm, they are unstable and fragmented. On average, the rain drops are 1 to 2 mm in diameter. The biggest drop of rain on Earth was recorded over Brazil and the Marshall Islands in 2004 - some of them were larger than 10 mm. The size is explained by condensation on the large smoke particles or by collisions between the drops in small areas particularly high content of water.

The Rain drops in their lively impact Terminal Velocity, which is important for larger drops. On the sea and wind, 0.5 mm impact Drizzle about 2 m / s, while the 5 mm major impact on the drops of about 9 m / s. the sound of rain drops beat the waters by air bubbles Arm under water. See drop.

As a rule, the rain has a pH value of slightly less than 6 years. This is because the atmospheric carbon dioxide dissolves into the drop to form tiny amounts of carbon dioxide, in particular a part, by lowering the pH value. In some deserts, the dust in the air contains enough calcium carbonate to combat the natural acidity of rainfall and the rainfall can be neutral or alkaline. The brisk pH value below 5.6 is considered to be the acid rain.