Insect Definition and 49 Threads

Hello, I am curious to find the moment of inertia of an insect. My guess is that I use the formula to find the moment of inertia. I would appreciate any help.

Suppose some insect is squashed, let's consider a spider for example; suppose it doesn't move and doesn't react to external stimuli but is still alive; the observer doesn't know this and he wants to determine for sure if the spider is still alive. How does he do this?

I am putting this in General Discussion because it could go into either biology or aerodynamics. Remember how bumble bees were not supposed to be able to fly aerodynamically? This explains why that is wrong. Here is a podcast I just found (came out in 2019). The two podcast guys interview...

Here's something different: I just heard a podcast about recent biological research. Fly are insects (arhtropods) with an exoskeleton. An exoskeleton cuticle covers are the exposed surface areas of their equivalent of skin cells. The cuticle is usually stiff and hard (to resist mechanical...

While in quarantine, I've been reading a lot about some millimeter-scale flying robots, like DARPA's Nano Hummingbird and others. I'm noticing that a lot of millimeter-scale flying robots flap their wings like a fly, and I'm wondering if it's even possible to use this motion to move if the fly...

Which senses (hearing, seeing and so on) would be necessary to accomplish what flying insects do?

There is an insect called the Issus Coleoptratus that has biological mechanical gears that is uses to use its legs.

I just found this insect and I don't know what is it. It seems to be the larva of a fly or maybe a little butterfly. I live in Spain so it is fall. What should I do with it?

Popular science version: (Let me know if the link has problems) https://www.washingtonpost.com/science/2018/10/15/hyperalarming-study-shows-massive-insect-loss/?utm_term=.f9b8006df72b Long term sampling from the 1970's to 2017/2018 shows losses of insect, arthropod, and insectivore populations...

It's easy to find descriptions of how the nervous systems of species differ in the organization of nerves, but are there any important differences in the individual cells? For example, are the individual nerve cells of insects similar to individual nerve cells of humans?

Homework Statement The surface of a liquid is just able to support the weight of a six-legged insect. The leg ends can be assumed to be spheres each of radius 3.2 × 10−5 m and the weight of the insect is distributed equally over the six legs. The coefficient of surface tension in this case is...

This is an academic question - out of curiosity - not so much about actually getting relief. I've got a nasty mosquito bite on the under side of my forearm. It's a Muskoka mosquito - the big ones with the really itchy bites. Even if I don't scratch it, it still rubs on everything from desk...

Obviously in a biome consisting of high density of carnivorous plants any insect that can recognize these plants or at least recognize organs associated with carnivory will get fitness advantage. So it seems a very natural thing to evolve from insects point of view. Has it happenned? If yes...

Sir David Attenborough wonders into the wonderful world of the termites in South Africa to better understand the ways in which these amazing animals ventilate their homes, breed, and fight for survival. Brilliant video from BBC insect and wildlife show 'Life in the Undergrowth'.

In this remarkable BBC footage, Sir David Attenborough reveals the world of insects such as ants, stick insects, beetles and digger bees.

Given a scenario, where a car is going at a speed of 150 km/hr on a straight and level road. There is an insect flying inside the car. To a person inside the car, (I really do not know how to say this, but I hope you understand), the insect is flying naturally, basically, the speed of the car...

Dear PF Forum, Can ants reproduce without their ant queen? Supposed I trap some ants, perhaps tens to 1 hundred. And I keep them in a box, ventilated with some food - candy; chocolate; Will they reproduce, considering in 1 hundred ants, not all of them will be all males or all females. Or they...

Moths do get attracted to artificial lights but the do not all go toward sun as sun also produces enormous light. So they would have gone toward sun.. And why do they get attracted toward lights...

Homework Statement (Important disclaimer: I came up with this problem out of curiosity in a classical mechanics course, so it might not be in a textbook, in the right place, or even solvable for that matter. However, I feel like it should be solvable, and most likely with elementary methods...

I've been riding my bike in the park and I've noticed this guy passing by. It was of a hand palm size. Intriguing. Can you help me identify the insect?

1. The problem: A plane mirror of length 2m is kept along the line y=-x as shown in the figure. An insect having velocity of 4 cm/s is moving along x-axis from far away. The time span for which the insect can see its image will be:A)50 sec B)25 sec C)25√2 sec D)50√2 sec 2.The answer...

Homework Statement Insects don't need lungs. They breath through their skins. In this way they can get enough oxygen to fuel the basic metabolism that is common to all life. Approximate an insect by a cylinder of diameter 4mm and length 5mm. Assuming that the density of the insect is...

How common is it to find fossilized insects entombed in Amber? I ask because there is a jewelry vendor here in Maui who claims that her amber jewelry encapsulating a variety of insects were created naturally, mined in the Baltic area and are thousands of years old. She sure has a lot of these...

Insect eggs, cocoons, or droppings of some kind? All over my terrace I am finding strange grey balls, does anyone have a clue what they could be? They're about the size of a rolled up pillbug, smooth surface with a matt gloss. I've never seen them before, maybe some nice bug is inside or...

I am given X^= ax -bxy-mx^2-p Y^=cxy-dy The insect population is measured in tons and the bat population in hundredss. The term -p reflects poisoning by farmers. The IVP are x(0) =40 and y(0)=1 the question is whether the poisinoning of the insects serves a purpose in the long run. I let p=0...

Insect uses mechanical "gears" to coordinate jumping journalist report: http://www.csmonitor.com/Science/2013/0912/Insect-uses-gears-to-jump-study-finds scientific report: http://www.sciencemag.org/content/341/6151/1254

1149 The lifespan of a particular species of insect is normally distributed with a mean of $57$ hours and a standard deviation of $4.4$ hours. $90\%$ of the insects die after $t$ hours. Represent this information on a standard normal curve diagram, indicating clearly the area representing...

just seeing how I did on this one:confused: The lifespan of a particular species of insect is normally distributed with a mean of $57$ hours and a standard deviation of $4.4$ hours. this is the normal distribution with $\mu = 57$ and $\sigma = 4.4$ tried to standardize this by...

Homework Statement Some insects can walk below a thin rod (such as a twig) by hanging from it. Suppose that such an insect has mass m and hangs from a horizontal rod as shown in Fig. 5-35, with angle θ = 40°. Its six legs are all under the same tension, and the leg sections nearest the body...

Homework Statement A typical flying insect applies an average force equal to twice its weight during each downward stroke while hovering. Take the mass of the insect to be 10 g, and assume the wings move an average downward distance of 1.0 cm during each stroke Assuming 100 downward strokes...

Homework Statement In an old record player, the flat round vinyl disc (record) is placed on a turntable which spins around. Once it gets going around and around, it moves so that the number of revolutions it makes per minute is constant (33 and 1/3). An insect settles on the edge of the...

Homework Statement ok this is a little silly. An apparatus of the figure below is designed to study insects at an acceleration of magnitude 910 m/s2 (= 93g). The apparatus consists of a 2.0-m rod with insect containers at either end. The rod rotates about an axis perpendicular to the rod...

I have a very basic question that I have not yet found the answer to. Basically it's this: if you are traveling in a vehicle at 60 mph, what is it that allows a flying insect inside the vehicle to fly around? Is the insect traveling at 60 mph plus or minus its own speed depending on the...

The problems in this set of problems that I am doing are generally hard (at least to me). Here's the 5th question which I'm not sure whether or not it IS that simple or just deceptively simple. Horseshoe bats emit sounds from their nostrils and then listen to the frequency of the sound...

We have heard that the http://www.uvm.edu/albeetle/faq.html#2" is invading the Massachusetts area. I don't think that this is one since it does not look like the one in the photo; but I want to rule out the possibility of it being a relative. Any ideas on what this is?

We were walking down a Brooklyn sidewalk the other day under several trees when we spotted this insect lying motionless (except when the wind blew, it moved its legs a little to rotate itself). We didn't get too close, as it looked like it could give a bad sting. It has two pairs of long veined...

Hi everyone! I have a question for you :) I am wondering, if there already is a developed model, imitating insect wings, e.g. bee wings. If you happen to observe them, they seem to be much more complex, but also much more useful and allow a more flexible movement. Insects fly with them not...

Homework Statement If the coefficient of friction between an insect and bowl surface is u (mu) and the radius of bowl is r, what is the max height upto which the insect can crawl in the bowl? a) r/root(1 + u2) b) r [ 1 - 1/root(1 + u2)] c) r [root(1 + u2)] d)r [ root(1 + u2) -1 ]...

I've been having difficulty with this problem and can't seem to find where to start. Any help would really be appreciated. A water insect maintains an average position on the surface of a stream by darting upstream (against the current) then drifting downstream (with the current) to its...

How do insect legs work? Especially the really small ones that are thinner than human hair? Are they moved by muscles just like peoples? Thanks.

How is it possible for insects to survive after they've had their head removed?

Hi all, I am involved in a project to fly small moths down a wind tunnel to measure their flight patterns. the moths fly a total of 1.15m into a headwind of 1m/s. i am currently using velocity=distance/time to calculate an average speed but am unsure if this would be a called a...

Just now, i found a flying bug in my bedroom. The insect was greyish in colour, and when i tried to kill it, it will flap its wing and release some brown spore/powder. Anyone has any idea if the insect a dangerous one? and the brown thingy released too? P.S. I killed it by wrapping tissue paper...

Hey everyone, APOD just announced today that the consensus regarding the strange streak in the Australian picture that people claimed was a meteorite is likely just an insect after all. Here's a more detailed explanation- http://www.cloudbait.com/science/darwin.html

Why is it that when you get stung by a bee or bitten by a mosquito that the area around it becomes inflamed? I remember hearing something on the discovery channel that snake venom was just harmful enzymes which digested your flesh, is that how all venom works?

My first post! Okay...this is going to sound really weird. My 32 year-old brother is CONVINCED there was an insect inside of him (not to be too graphic..but he found it in the toilet, after using). He said it resembled a silverfish or earwig and was alive. I say this is impossible...it had...

Do all insects come from eggs? Are any the result of chemical reactions alone?

What determines the Colour of BLOOD And why the colour of insects different? I don't know Biology But i want the answer for above just to add to my knowledge

"Scientists have developed a robotic insect which walks on water. The team, based at the Massachusetts Institute of Technology (MIT) in the US, were testing out a theory about how one family of foraging insects performs the same trick" http://news.bbc.co.uk/2/hi/science/nature/3126299.stm