The scale should show zero. The container is not to be weighted in scientific research of any specimen, in this case none of the flies are touching the container thus no weight registers.
The scale should read zero because tare was ran on the jar and the flies are flying.
u wot m8?
Jar is filled with Nerve Gas, answer: 5 dead flies and one jar I'm never gonna touch again.
0.5 kg is correct. The flies will create upright momentum when they fly into the lid. However, if you kill the flies, it will show 1 kg because when they land on the bottom, they add 0.5 kg to the other 0.5 kg.
your logic is fucked in that
Even if it stated that the flies were flying into the lid "it doesnt" the force lifting the jar created by the flies is not going to equal their fucking mass you autist
These flies are fucking huge. Assuming that they collectively weigh .5 kilos, then that means that individually they all weigh about a third of a pound. That is fucking massive.
Holy fucking whit I had to scroll all the way down to here to find the correct answer.
What he is saying is correct, the flies need to exert downward thrust to keep themself flying and, according to newtons third law, this force is oppsed by an exual force from the bottom of the jar/scale and therefore add another half kilo to the 1 kilo jar.
BTW, those are some heavy fucking flies.
You're truly a fucking moron... true the flies may be generating greater than the force required to keep them airborne, but they need to generate lift at least equal to their mass DOWNWARD against the force of gravity if they want to remain aloft...
ITT: fucken retards.
The flies only take half of the total mass inside the jar so if you add everything together including the mass not displaced by the flies then it will show as 2kg you retards.
I'll take the lead and weigh it on the Moon and keep the feathers here on Earth. Lead won't weigh 1kg on the Moon so fuck you the feathers weigh more. Should be asking which has more mass.
I see a lot of people saying the jar would weigh 1.5kg since the flies exert a downward dorce on the air, pushing down on the scale. The air, however has to go somewhere, right? Where does it go, then? It goes right to the top of the jar again, hits the lid. The lid then gets pushed upward and negates the 0.5kg force pushing down on the bottom of the jar. The real answer ia the flies wouldn't be able to fly at all. They get pushed down from the air stream in the jar. The only way they would be able to fly would be if they constantly accelerated their flapping to account for getting pushed down. Now I am no expert but it seems to me the jar would weigh 1kg. If any phtsicsfag cares to correct me, please do. I have none of the equations for this kind of stuff in front of me and none of the necessary experience to know any of this. I'm just speculating.
it is not the momentum of the moving air that makes the difference
this constant airflow just keeps the flys flying. the rest is newtons law, without considering the details.
just by knowing, that the sum of all forces is zero (the jar is not accelerating relatively to the scale, right?) we can deduce a posteriori, that the mass has to be 1.5 kg. by the same reasonings that would apply, when all flys were dead and fell to the bottom of the jar.
The scale reads: I I \ \ \ I
This actually depends on whether or not the jar is air-tight. If it is, then it would weigh 1.5 kg, but if not, then only 1, since the scale measures the total amount of mass pressing down on it.
It would weigh 1.5 kilos if you added 500g if flies.
Since it's a sealed container the flies, if they're flying would behave like gas particles. If you add 500g of gas to a sealed system, the sealed system would weigh 500g more.
> helium makes a balloon lighter
Only if it replaces the other gas volume. If you ADD 500 g heliium to a volume, than well, you have 500 g MORE inside that fucking volume.
Only the jar adds weight until the flies land. You people need Jesus. And a math tutor.
Okay, so first step is to measure out a gram of feathers.
>Put feathers onto scale until scale reads 1.0
Okay, I now have a gram of feathers. Next step is to put a gram of feathers onto a scale to see how much a gram of feather weighs.
>Put feathers back onto scale
>Scale reads 1.0
You're a fag, but I am still replying because fuck that shit
Everyone stop arguing about science and check my digits. Priorities, /b/tards
>Lead won't weigh 1kg on the Moon
>Using the word weigh and talking about mass in the same context.
Fuck off summerfag I know what I said
weight is not mass is not pressure
a scale calibrated to 1 atm will on average read slightly above 1kg
Imperial. This weighs about the same as five bushels of barley,
Metric system: this weight is
defined as one-tenth of the SI base unit, the kilogram, or 1×10−3 kg, which itself is defined as being equal to the mass of a physical prototype preserved by the International Bureau of Weights and Measures
Science versus "idunno, kinda this much lolwhocares"