How mosquitoes fly in the rain
Mosquitoes are relatively small and rather fragile-looking insects. However, they show an amazing vitality, and continue to bite us despite the many protective and deterring agents. But the most striking feature of this insect is its ability to fly in the rain.
For a mosquito, a direct hit of a raindrop means about the same as dropping a three-ton truck per person, that is, instant death. A normal drop of rain weighs about 50 times the mosquito, and if it hits an insect sitting on a horizontal surface, it kills it. And, nevertheless, mosquitoes manage to quite successfully move in the rain.
Recently, an article appeared in the journal Proceedings of the National Academy of Sciences in which the dynamics of a collision between a raindrop and a flying mosquito is viewed from the point of view of physics. Scientists used a high-speed camera to understand the basic principles of insect interaction with a drop.The experiment was carried out in a special installation, where a spray gun with a pump was used to simulate rain.
The average size of a mosquito calf is 2-3 mm in width and height and about 7 mm in length with a weight of 2 milligrams. A drop of water weighs 100 milligrams, and its diameter is 2-3 mm. Considering the average frequency of falling raindrops and their speed of about 9 meters per second, it can be concluded that the collision of an insect and drops will occur once every 20 seconds.
Scientists were able to determine that when a drop hits the paws, the insect tumbles to the side. If a hit falls into the body, then the mosquito for some time moves down along with a drop of about 60 mm, and then leaves it. Thus, the insect can fly safely in the rain.
Date: 11.10.2018, 05:12 / Views: 93382
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