Gaaaaaaaaaaaaaaaaaaaaaaaaaaaaaay dick icon.

Answer: OP is a faggot.

>>681183156
>1 fly weighs half of the jar
Jesus christ, what is the fucking jar MADE OF?!

>>681183466
>yfw you realize that fly weighs over a pound

>>681183156
The flies are way too heavy

>>681183156
1,5kg

Also, if you have 0,5kg of flies and a 1kg jar, the jar is either really large and made from extremely light material, or you just have a regular 1kg jar with fly jam in it.

>>681183156
The answer is 1 kg, but those are some fatass flies

answer is 1 KG as the flies are not touching the jar to increase its weight the fact that they are in flight means that they do not affect the overall weight at all.

Flies push down on the air, the air pushes down on the jar. The answer is 1.5kg.

I'd be scared to see these flies in person.

>>681183823
The flies don't float. As stated, they have a mass of 0,5kg. According to newtons third law, their wings push the jar down with the same force they push the flies up, thus making the scale read 1,5kg.

retard

Okay so the lid to the jar is closed, meaning that there is no air getting in or out.
A scale will measure the air within the jar as well, so long as that jar is closed air-tight. There are flies in the jar that are hovering away from the walls to prevent the jars weight from changing yes? It doesn't matter. Lab scales can measure the weight of a breath, so assuming that the flies do weigh 0.5kg, the weight of the flies would add with the weight of the air in the closed jar, plus that of the jar itself. So 1.5kg

>>681183156
depends on wherever the jar is covered or not

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>>681184380
Mfw you actually believe that made up bullshit, good luck with life anon

>>681184380
ROFL fail

>>681183156
The flies have to exert downward force on the air in the jar to stay airborne.
1.5 kg.

How much does the air weigh in the jar? And the air and dust on top of the scale? Also temp of room to see if more of less air is affecting the weight of the scale and miniscule amounts of dust based on more space for contractions or expansion of the jar.

>>681183156
they probably weigh nothing because they don't collectively apply all of their weight in wing force to produce the necessary lift. They apply some lim->0 of force over many hundreds of times to produce the necessary minuscule amount of force needed aka no extra weight on the scale

Just tried this. Reads 1kg. Flies died, no air. Still read 1kg. Three flies aren't 0.5kg.

>>681185209
>american education

they're called flies because theyre FLYING

>>681184380
>75 ton plane flies overhead
>we are all crushed buy 75 tons of pressure above us

>>681183156
The jar and the flies don't weigh 1 and 0.5kg. That's their mass.

>>681183777
The Flies are flying...

>>681185771
planes don't fly up and down?

>>681183606
>>681183466
There are 5 flies you dumbfucks, but still 0.1 kg is a giant ass fly

depends if there is a lid or not

>>681185676
do not correct amerifags anon,
You only get sanctions and your home gets declared rogue state.

>>681185771
Most planes work on the basis that the air travelling above the wing takes longer to pass over than the air beneath it, creating a negative pressure gradient and essentially sucking the plane up

If there is no airpressure difference, its 1kg
Best regards from finnish teen :^)

>>681185676
you think flying is magic?

they apply force proportionately to their lift, though in this scenario (and most) they won't apply enough force at any given time to make a difference. If you replaced the scenario with a large eagle or a pterodactyl then yeah you'd notice the scale reading jump every time they flapped their wings

>>681186439
Sorry, the air above the wing travels faster

>>681185771
The force comes from the engines, the wings don't flap you dumb nigger

>>681184767
>>681184916
Too obnoxious not to be bait.

>>681185771
>>681186124
Please die

>>681185771
that's not how planes work

if you replace that with a harrier(?) vertical lifting jet, then yes, you'd get crushed by its lifting force

>>681186754
Ive never seen a comment so stupid. stick to making burgers

>>681187084
How can a 'lifting' force crush someone?

>>681187084
I agree with you in part, there will be a force, but an objects downwards force is not equivalent to it's weight. If you stood under a helicopter as it was taking off you'd feel the force, but it wouldn't crush you with 3 tonnes (or whatever a helicopter weights) of force.

>>681187356
I imagine he meant thrust

>>681187512
Well lifting is done by multiple thrusts, so a helicopter would get a few hundred/thousand instances of thrust per minute, collectively lifting the vehicle but not applying any lethal force.

The jet scenario on the other hand would probably burn you before crushing, but i presume it's possible

>>681187342
except his comment was correct

>>681187512
Why not though

>>681183156

LISTEN DUMBFUCKS

It (theoretically) would be larger than one if the flies we close to the bottom, but as the air is compressed it behaves as a fluid so areas at the top would notice the force but not at the bottom as the force is dispersed from areas of higher pressure being formed below it and forming a reactionary force

>>681184380
Moron

>>681187879
Upthrust exists. It's how boats stay afloat. But I don't think you can apply that to flies in the air.

>>681183156
1Kg + weight of the flies - their volume in air

Do you know how many flies you would need to reach 0.5 kg? Close to 100K. No way could you ever fit them in a jar that only weighs 1 kg. There's your answer: 0 kg. Because it's impossible.

>>681188143
Here's someone to listen to.

>>681188143
this and only this

>>681185771
>we are all crushed buy 75 tons of pressure above us
you're constantly crushed by a mass equivalent to the height of air above you yes you fucking retard

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>>681188143
This guy seems to know what he's squeaking about

>>681188463
>Air weighs the same as a plane

TOP. LEL.

>>681188381
>>681188143
>>681188384
>>681188540
>inb4 samefag

>>681188707
One of those is me. Can confirm at least 2 people.

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100 gram flies

what the actual fuck op

Jar is sealed: 1.5kg

Jar is open: 1kg

/thread

>>681183156
1 kg.

>>681188143
Wrong

>>681188821
But how do I know you're not me and I'm not just samefagging? This whole thread could just be me talking to myself

>>681188256
boats float via buoyancy

for air that'd be a hot air balloon or anything else that contains material lighter than air

>>681189145
Nigga I have a theoretical degree in physics

What happens if I stand on some scales, then jump, do the scales still register my weight when I'm in the air?

>>681189392
>theoretical degree
kek

>>681189392
>Theoretical degree
I'm dying.

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>>681189238
>material
you mean gas

>>681183156
>3.5

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>>681189392
obligatory

>>681183156
>1.5kg
>Why?

Because the flies have to displace an amount of air equal to the weight of the flies. Since they weigh 0.5 kg they have to displace 0.5kg of air, therefore the scale reads 1.5kg.

>>681189525
>>681189508
ngl I just stole that joke from fallout new vegas

A quick Google reveals this question has been asked a thousand times. The answer is 1.5kg.

>>681188143
>in a closed location
>the mass goes away becuase its dispersed
>but where is it dispersed to tho

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>>681184380

>>681189835
The mass of the jar (which includes the flies inside of it) does not change depending on the location of the flies.

>>681184380
Dis is right tho.

>>681189644
material, object, stuff, substance, item

yes

>>681184380
blow with a hair dryer on a scale
or pressured air

same effect and correct

>>681189472
No but they register additional weight during your jump

flying via wings is basically jumping off of the air

>>681190047
That's what I ment it would be dispersed in the jar

>>681190338
I know, I'm agreeing with you.

>>681190323
You're right. Didn't think of it like that.

>>681187072
>>681184380
Samefag

>>681190237
you've stated something about a hot air balloon and in this case it would be gas. in general "material which is lighter than X" is correct

>>681186421
/Thread

>>681184380
are you actually downs do you not understand newton's laws?

>>681190310
Yeah but that only would work at short ranges. Imagine in you had an incredibly long tube attached to the hair dryer, the scale wouldn't read an increase of 1kg a km away if the hairdryer exerted a force of 9.81N. The assumption people who say 1.5kg are using is that the gas is an incompressible material, as opposed to a fluid which 'dampens' the force

>>681188463
No, you are "crushed" very slightly by the pressure around you faggot

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>>681190563
Nope, we just happened to both be right.

Mythbusters tried something similar, if birds in a truck fly, does the truck get lighter? The answer was no.

This is directly applicable, if you think the flies are on the bottom of the jar when you take the measurement, then they take off, does the jar get lighter? The answer is no.

>>681191140
Like imagine if you punched someone, but they had 100 pillows in front of them- they wouldn't feel it. But if it was a solid block they would

>>681190581
you're arguing about semantics which are unimportant

>>681183606
well how much does 1 pound weigh I'm sorry not from England I have Lev sorry for bad english.

>>681191587
+1. Let's stay on topic for once on this site.

If lid, jar=flies
If no lid, just jar.

the distance between the object and material and that force exerted is what is required to determine the weight on the scale so if you give us the exact gas mixture in the jar we can solve the force that the flies are really exerting downwards

>>681183156
1kg the flies are flying

>>681191924
Bad bait or newfag

>>681183156
Unless the flies land on the jar, the weight for them is not counted.

>>681192271
No, just amerifag

>>681192364
you think flying doesn't apply force onto its surroundings?

>>681187512

Actually it's more than it's weight. In order for a harrier or a helicopter to lift itself it needs to provide a net acceleration against gravity. The downward force that is provided is done by, in the case of a helicopter, by literally climbing through gas. The curvature of the blades pushes down on the gas fast enough against the torque of the motor in order to do this. The gas that is pushed down spreads out very quickly so the weight of the helicopter is distributed over a large surface area.

Harrier vertical systems work a bit differently but the concept of their downward thrust being distributed over a surface area much larger than their body still applies.

TLDR; Applied thrust is greater than the weight of the vehicle in vertical take offs but pressure distribution means that the downward force per part area is much much lower than their weight over the area of the original body.

>>681184380

this.

The flies are not applying a force to the jar so it's 1kg

You can test it yourself with a bottle. Put no cap on it and weigh, then blow it full of air and cap it, then weigh.

If jar is closed, 1.5kg

But it wasn't specified so we assume open and as a result 1kg.

>>681192561
No need to TLDR;. Thanks for the informative response.

>>681187939
He's desperately trying to b8

>>681184380
all the replies to this post can't be trolls. this dude is right lol. if you put a glass of water on a scale, and put you finger in the water (without touching the glass or scale), the weight on the scale will be greater

>>681184251
No, the flies don't push down on the air, because the air was already displaced when the jar was closed.

Even if the jar was open the flies would definitely apply a force to the jar. Some air would escape so the force would be a bit dissipated, so the scale wouldn't read quite 1.5kg but not 1kg either. Somewhere in between.

>>681185771
nig nog potato detected

>>681193311
Meant to quote >>681192769

>>681193217
Not really, again you're making the assumption the water is incompressible- that the force exerted by your finger on the first row of atoms is the same as the force exerted by the first row on the second, the second on the third etc

>>681183156
The force force created by the flies would not be enough to add any noticeable weight. The answer is 1kg.

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>>681191663
>how much does a pound weigh

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Man physics is cool. It can get a bunch of gay people to attack each other in a tribal manner as they begin to boil the argument down to 2 sides.

>>681184433
no. the scale measures the total normal force it exerts on everything that is applying a force of down on it. the jar applies a force on the scale to push down on it, so the scale measures its weight. the flies do not contribute to that weight because they are flying. while their wings produce an upward force, counteracting the effects of gravity, the force they exert downwards (which they must because of newtons third law of motion) this force is on the air. since air is compressible, this force gets "absorbed" by the air and gets negligibly transferred to the jar, so therefore the scale would show 1kg.

>>681193598
try it at home and you'll see

>>681193217
thats because water, unlike air, is incompressible. this means that the force will get transferred almost completely. in air, this is not the case. if you had an empty glass and put your finger in the glass, without touching the sides, would it display a greater weight? no, it wouldnt

thank god none of you are trying to be physicists in the real world.

>muh newtons third law

force on air downwards is not linear, in fact it looks similar to an electric field diagram - implying that 'vectors' of the force lines would be infinitely split to the sides and down, insignificantly adding to the weight. not only that, it is an initial force - not a constant force. thus the scale would read extremely slightly over 1kg implying it could read to the 1000th degree

>>681194504
>air is non compressible
>water is compressible

Wot

>>681194211
The force you're exerting on the water will not be the same as the force the water exerts on the bottom of the glass- (ok there will be some force transmitted as water isn't entirely compressible)- the act of compression takes some of the energy out of the vibration in the same way crumple zones in a car work

>>681185938
true, but the scale (which converts force to mass) would only display the mass of the jar. also on earth they are the same, just different units

>>681194597
Fuck you, nigger.

>>681194597

more so, the mass of the jar is independent of location

>>681193217
>if you put a glass of water on a scale, and put you finger in the water (without touching the glass or scale), the weight on the scale will be greater

No it won't, if you put the finger in the water the scale will weigh the same. This is because unlike the flies, the finger doesn't need to apply a force downward to keep its position because it is attached to the rest of your body which applies all the necessary force to the floor, not the water under the finger.

>>681194597
Nah.

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>>681183156
Which fly weights 100 grams?

>>681186124
Today I learned you have to be touching the ground to have weight.

>>681187356
because the force it is exerting to thrust upwards is also exerted downwards (newtons third law) and that downward force would be so great that the compressible nature of air wouldnt dampen it enough, and youd feel it

>>681183156

If there are holes in the jar, 1kg
If there aren't holes, 3.5kg because the flies die from lack of oxygen

>>681193995
He obviously meant how much kg a pound is.

>>681194597
Wrong

>>681194833

>answering a physics question

can't you tell i'm white?

>>681195070
no, it's four flies weighting 1 gram and one fly weighting 496 grams