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How mosquitos deal with getting hit by raindrops

phenomena.nationalgeographic.com

11–20 of 81 posts

Re: How mosquitos deal with getting hit by raindrops

#11
> But because our mosquito is oh-so-light, the raindrop moves on, unimpeded, and hardly any force is transferred. All that happens is that our mosquito is suddenly scooped up by the raindrop and finds itself hurtling toward the ground at a velocity of roughly nine meters per second, an acceleration which can’t be very comfortable, because it puts enormous pressure on the insect’s body, up to 300 gravities worth, says professor Hu.

Interesting article, but in the span of one paragraph here we have confused velocity, acceleration, and pressure - and there are similar errors in the following one. For an article about physics, I would expect this to at least be proofread.

The Gell-Mann Amnesia effect: http://harmful.cat-v.org/journalism/

Re: How mosquitos deal with getting hit by raindrops

#12

Earlier quoted context omitted.

Yes, Robert Krulwich has joined the Nat Geo Phenomena blogging platform [ http://phenomena.nationalgeographic.com/blog/curiously-krulw... ]

I think the commenter meant that Krulwich actually illustrated the piece too. Who knew Krulwich could draw!

Ah, I see. My bad.

Yes, Krulwich does draw pretty well.

Re: How mosquitos deal with getting hit by raindrops

#13
post #6

Of course the video doesn't show anything interesting, the mosquito's leg is hardly even grazed. I was definitely hoping for the version where a drop smacked the insect dead on target. Fairly strange for a lab result - if that's the only video that was captured, it really doesn't seem to divulge much at all. Where's the cool video? :D

https://www.youtube.com/watch?v=LQ88ny09ruM

Direct hit just after the minute mark: https://youtu.be/LQ88ny09ruM?t=1m3s

Re: How mosquitos deal with getting hit by raindrops

#15
post #11

> But because our mosquito is oh-so-light, the raindrop moves on, unimpeded, and hardly any force is transferred. All that happens is that our mosquito is suddenly scooped up by the raindrop and finds itself hurtling toward the ground at a velocity of roughly nine meters per second, an acceleration which can’t be very comfortable, because it puts enormous pressure on the insect’s body, up to 300 gravities worth, says…

It is pretty sloppy, but if you assume that `pressure' is just meant as a synonym for `strain', which it is in normal English, it does make some sense. And velocity and acceleration aren't confused under a very charitable interpretation: they describe that the velocity changes `suddenly'. That's an acceleration.

The real problem is here:

> But because our mosquito is oh-so-light, the raindrop moves on, unimpeded, and hardly any force is transferred.

We have a transfer of momentum (force times time), but no dissipation of energy (force times path).

Re: How mosquitos deal with getting hit by raindrops

#16

It would appear they haven't yet evolved to deal with being hit by cars quite as gracefully.

I think this can be approached the same as the "ants can lift 50 times their own weight" bit of trivia. It doesn't translate to "if a human were as strong as an ant he'd be able to lift an elephant" because size doesn't scale that way. Ants and mosquitoes get away with larger forces relative to their mass because the skeleton and muscles needed are still within reasonable material and fuel costs. A human-sized animal…

I think theVirginian was commenting about mosquitoes getting smashed on a car's windshield, not about cars and humans.

Re: How mosquitos deal with getting hit by raindrops

#17
post #13
post #6

Earlier quoted context omitted.

https://www.youtube.com/watch?v=LQ88ny09ruM

Direct hit just after the minute mark: https://youtu.be/LQ88ny09ruM?t=1m3s

Watching it several times, it looks like only the left most mozzie came out unscathed. The other two took it hard and went down... definitely didn't 'walk off the bus' :\

Re: How mosquitos deal with getting hit by raindrops

#19
post #14

Does this places a reasonable selection pressure on the kinds of flying insects we can have? Big enough to shrug off a raindrop hit, or small enough to surf along the surface tension until it can slide off?

Butterflies just seek shelter.

http://www.scientificamerican.com/article/what-do-butterflie...

Re: How mosquitos deal with getting hit by raindrops

#20
A commenter on the site says that some type of mosquitoes (Texas) are used in oil drilling. I tried googling "texas mosquitoes oil drilling" and variants, but didn't find anything.

>"Why, one species even secretes an enzyme to dissolve the organic matter in blood leaving only the iron in haemoglobin. Then another enzyme causes the iron atoms to join to form biological drill pipe! These structures are known to be as much as 6 inches in diameter and to extend a mile deep."

Is there something to it or he just went to on the internet to tell lies?

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