/sci/ - Science & Math

>>11175256
1.5 bc of the normal force bc the flies have to exert 0.5kg down to keep themselfs up.
UNless.... maybe the scale was zeroed with the jar on it... hehehe....

Is the jar airtight or not?

>>11175260
>normal force
do you know what you are talking about?

>>11175260
The force of the flies buzzing all over the place would likely cancel itself out, it wouldn't be a perfect downward force. 1kg is the answer

>>11175278
No. For a fly to, well, fly, it must supply a downward force to the air equal to its weight. In a closed container, that air cannot escape, so its motion supplies a downward force to the container that is exactly the same as the weight of the fly.

Now, the apparent weight of the jar will fluctuate slightly as the flies accelerate and decelerate, but the fluctuations will always average out to the weight of the flies.

Also, if the container isn't sealed, such as an open cage, then the air can escape into the environment without transferring its full downward force to the cage, and it will be lighter when the flies are flying.

can /sci/ solve this?

>>11175256
3.5 kg
>>11175280
Well, not all the flies will be airborne. A lot of them will be resting on the walls and bottom of the jar, so you have to take that into account as well.

>>11175256
>lel such a 'ard broplem xD
>are u scientits enough? xD

>>11175298
>Well, not all the flies will be airborne. A lot of them will be resting on the walls and bottom of the jar, so you have to take that into account as well.
Those are even simpler and just add their weight to the jar straight up

>>11175256
>kg
not a weight unit

>>11175276
in order for the fly to stay up, somethin ghas to push it up. imagine the air under the fly being the flys foot. then it is the normal force of the air pushing down on the botom ofhte jar

>>11175256
Does the jar contain air? It must otherwise the flies will simply drop dead and the jar will weigh 1.5kg

looks like water to me

retards look at the scale, it says 111,111. can't you read?

the scale cannot read

>>11175256
Are they african flies or european?

The scale reads || ||||.

>>11175256
Why is this posted every week?

>>11175465
How do you know so much about flies?

>>11175465
Those are some heavy ass flies. Probaby american.

>>11175256
None of the above.

It would be closest to 1kg if all the flies were flying near the top of the container and closest to 1.5kg if all the flies were not flying.

>>11176033
Because trolls aren't actually interested in questions, answers, or discussion. It's just a means of getting attention and feeling superior for poking around the proverbial ants nest.

1kg,the fly won't alter the reading.

>>11176099
What if the flies land at the bottom and contribute to a normal force?

>This entire thread
>What is Newton's third law
If the jar is closed the scale has to read 1.5 kg on average, otherwise the system would have an average acceleration.

>>11176100
what's an abnormal force?

>>11175256
0.5kg

>>11175256
3kg

>>11176105
The flies are acting on the air and the air has too many random motions for the force of the flies wing flaps to be transmitted to the jar. This is the reason why you can't feel a fly flying above your skin unless it's really close.

>>11176297
Remember force is a vector quantity, so each independent component is conserved independently. It's true that the force from the flies' wings is distributed among the air molecules, but the downward component must still sum to the weight of the flies, and so unless the air has net acceleration, the air must exert a sum total downward component of force on the jar equal to the weight of the flies. Momentum has to be conserved in a closed system, no matter how much it gets spread out.

>>11176317
To add on: the reason you don't feel the fly when it's a ways away is that the force is spread over a larger area, greatly reducing the pressure on your skin. Some of the force is also transferred to the ground away from your skin. If you were to put a funnel with a thin neck on your skin, put a fly in it and close the top airtight, you would feel the force from the fly as it buzzes around a ways away from your skin.

>>11175256
ITT /sci doesn't understand fluid mechanics

>>11175256
forget flies, imagine you are in jar that sits on a scale. when you're standing, the scale reads jar+you. when you jump, the scale reads jar+you+you pushing off the jar. when you are mid-jump (neglecting air and oscillations of the scale spring), the scale reads jar. if you average this over a long time, you'll get an average scale reading somewhere between jar and jar+you+jump.

flies are similar, except they push off the air, which pushes on the sides of the jar

Those are some thick ass flies tho

>>11176297
>This is the reason why you can't feel a fly flying above your skin unless it's really close.
no it isn't

1.5

>>11175256
Honestly this should continue to be posted every week as an indication of how many x migrants are here.
BTW in order for .5kg object to maintain altitude over the earth, it must exert that force downward.
Figure it out x tards

>>11176971
why do normalfags fixate on retarded schizos so much? no one is going to mass convert to flat earther beliefs if you ignore them

1.5kg- flies need to displace an equal amount of air to their body mass to stay afloat- air which would eventually push against the bottom of the jar, and into the scale.

1.5. I got to this by thinking what happens when the flys are all on the floor? 1.5kg. Then why would it change when they all take off if it’s a closed system? Their weight pushing down on the air stays the same as if they were on the ground.
Please lmk any problems

>>11176992
/Sci/ is over ran with xtards that I am surprised there isn't a thread about "scientifically" creating a succubus.

>>11176033
It isn't. It feels like that because you come here every day.

>>11175256
If flies are dead, it's 1,5 constant.
If flies are flying, it fluctuates around 1,5 depending on how often flies act as a team.

>>11175256
when you weigh yourself on the scale and not stay still, rock little bit forward, backwards to the sides etc. the weight measured will fluctuate by small amounts around your true weight. Here it is the same stuff happening, jar is closed, but instead of the glass moving (your body touching the scale) the flies are moving( your insides).

>>11175256
0.5 kg fly, that won't fly so 3.5 kg

>>11175256
https://www.youtube.com/watch?v=N0IGrSjcBZs

>>11175298
Absolute state of /sci/

>>11175262
flies could not fly in a vacuum

>>11175256
Nothing. Scales can’t read. I don’t even think they can spell.

>>11175256
>fly weighs 500 g
Wtf?

>>11175256
the answer is:
shut the fuck up

>>11175316
>benis

>>11175256
the real question is how did you breed house flies that weigh 100 grams