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10859796 No.10859796 [Reply] [Original] [archived.moe]

Post images that make you chuckle and make you feel smart at the same time

>> No.10859801
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>> No.10859805
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>> No.10859810


>> No.10859816

Thanks for your contribution

>> No.10859849

i looked at that for like a minute until i figured it out that's pretty funny lol.

>> No.10859854
File: 4 KB, 297x154, six.png [View same] [iqdb] [saucenao] [google] [report]

>> No.10859861


>What did the number theorist say before drowning to death?


>> No.10859861,1 [INTERNAL] 

I read your blog frequently and I just thought I’d say keep up the amazing work! https://www.singinglikepro.com

>> No.10861001

Thank you, anon!

>> No.10861028
File: 3.10 MB, 3664x2844, 1563897231340.jpg [View same] [iqdb] [saucenao] [google] [report]

I repost this one every time.

>> No.10861099

I will always smile out loud at this image. It's so true

>> No.10861114

What's the real answer to the problem?

>> No.10861124


>> No.10861126


>> No.10861130
File: 7 KB, 300x168, science.png [View same] [iqdb] [saucenao] [google] [report]

1.5 kg. The mass of an object is unrelated to the internal configuration of the object.

Same reason why pic related doesn't work.

>> No.10861202

It reads numbers :)

>> No.10861242

obv bait but i'll bite. it's not internal. the flies aren't INSIDE the glass. they are not transferring weight to the scale.

>> No.10861268

Why? The flies are suspended in the air.

>> No.10861276

That pic is the biggest cringe tho

>aspiri = a constant

hur hur hur

>> No.10861338

The flies are applying a downward force roughly equal to mg, that force pushes through the air onto the bottom of the jar

>> No.10861381


>> No.10861738
File: 36 KB, 720x883, 1557476727476.jpg [View same] [iqdb] [saucenao] [google] [report]


>> No.10861747

>Water and air are the same
Kek every time

>> No.10861756

Not only to the bottom. As 0.5kg of flies would need a fuckton of space and would also create turbulences the scale would probably show something like 1.01kg.

>> No.10861761
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>> No.10861765

Is the guy left from sun 0)))?

>> No.10861776

No. That's Grothendieck.

>> No.10861780

Remember that force is a vector quantity. Consider the vertical component of force: if the flies are on average not vertically accelerating, they must exert a force on average equal to their weight on the air, which transmits that force to the jar (since the air has no average acceleration) which transmits that force to the scale. So an average of 1.5 kg reading.

>> No.10861783

Wouldn't most of the vectors colliding with each other cancelling its forces out before it reaches the glass?

>> No.10861798

Each independent component of momentum must be conserved. The average vertical momentum of each body must be zero, or it would move away. If a body is in a gravitational field and isn't accelerating down, it must exert a downward force equal to its weight on other bodies. The flies exert this force on the air, the air on the glass, and the glass on the scale.

>> No.10861870

The fly applies pressure downwards the column of air over a squared area of 0,01 m. We have an air height of 0,3 meters inside the jar

The fly applies enough pressure to lift its own body, which weights 10^-5 kg (trusting 0,5/50000)
9,81 m/s2 * 10^-5 kg = mg [N]
(0,01 m)^2= 10^-4 m^2 = A

P= [9,81 m/s2 * 10^-5 kg] / [10^-4 m^2]= 9,81*10^-1 Pa
>Roughly 1 Pascal applied over 0,3 meters

I bet the flies don't move shit down in the jar
the turbulence is not spread

>> No.10861992

No need to consider pressure, it just overcomplicates things. All you need is force and the third law

>> No.10862302


>> No.10862812

then how can you know if the mere presence of the fly is negligible? is the jar open? if so, how high should be the fly to exert a relevant force downwards?
how about buoyancy?
the vertical force exerted on the fly would be proportional to the volume of the fly, reducing the vertical force

>> No.10862885

that's actually funny, anon

>> No.10862984

2D > 3D
oh fuck wrong thread

>> No.10863028

I see what you did there

>> No.10863030

only tolls answer 0.5

>> No.10863092

I'm assuming the jar is closed, that's what it looks like to me in the picture. Buoyancy doesn't change the fact that conservation of momentum, and thus Newton's third law, cannot be violated. Assuming gravity is the only externally acting force, the flies must exert an average vertical force down on the air equal to their weight, and the air must transmit that force onto the jar, which must transmit that force onto the scale. If that didn't happen, then either the flies, the air, or the jar would experience a nonzero average vertical acceleration, which they clearly don't.

>> No.10863436

Professor Cox teaches at my school. See also: the Cox ring.

>> No.10863466

>that force pushes through the air onto the bottom of the jar
To the bottom? But air is not solid, the force goes pretty much everywhere in the jar.

>> No.10863554
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>> No.10864015
File: 48 KB, 544x533, 0DF72960-0155-4AD6-9A5D-4E4859CD841F.jpg [View same] [iqdb] [saucenao] [google] [report]

>the force goes pretty much everywhere in the jar
wrong. The air molecules all bounce off of each other chaotically, but the majority of the force is directed downward and bounces off of the bottom of the jar, such that the average force applied to the bottom is 0.5kg. This is basic newtonian physics.

>> No.10864030 [DELETED] 
File: 152 KB, 470x470, 20190103_174504.jpg [View same] [iqdb] [saucenao] [google] [report]

Unambiguously 1.5 kg

>> No.10864041
File: 152 KB, 470x470, 20190103_174504.jpg [View same] [iqdb] [saucenao] [google] [report]

Unambiguously 1.5 kg, assuming the scale has not been zeroed
Nice b8

>> No.10864063


>> No.10864065

>nice bait
It's not newtonian physics, but it's still not bait.
Attaching furry prostitutes to your post is bait.

>> No.10864759

No. When a fly pushes air down with their wings, they create a small difference in pressure beneath and above their wings, which is where the air relocates. Doesn't domino force through air particles to the bottom of the jar. Also, that force wouldn't represent the fly's mass anyhow.

>> No.10864779

The force does represent the fly's mass. It's just Newton's third law, which is a consequence of conservation of momentum. Unless the fly has some nonzero average vertical acceleration (which it can't, since it's in the jar), it must exert a downward component of force on average equal to the fly's weight on the air. Likewise, unless the air has some nonzero average acceleration, the jar must exert an upward force on the air to balance this, which by Newton's third law, implies a downward force of the air on the jar corresponding to the fly's weight on average.

>> No.10864810

Maybe I don't understand, but by that reasoning shouldn't you be able to feel birds as they fly over your head?

>> No.10865546
File: 56 KB, 720x501, 774303CF-7220-48C1-A10C-2F7668C03A1A.jpg [View same] [iqdb] [saucenao] [google] [report]

You can if they fly just above your head. Otherwise the force they exert downward is diffused over a large enough area that it is unnoticeable to a human, but it is still exerting that force. Think about it this way; if a person is floating in a pool, their weight adds to the total weight of the pool, but if youre underwater, you dont notice a great difference when they float above your head.

>> No.10867114

>Unless the fly has some nonzero average vertical acceleration (which it can't, since it's in the jar),
it has vertical force, im telling you fucking moron
BUOYANCY Archimedes' law affectz air as a fluid. It's relevant since the fly has low mass-volumen ratio (density)

>> No.10867465

Buoyancy is part of the force that keeps the fly aloft, the rest is provided by the fly's wings. The total vertical force, after accounting for everything, must equal the fly's weight on average for the reason I already explained. That's the beauty of understanding Newton's Third Law and conservation of momentum: you don't even need to understand buoyancy, turbulence, or any other aerodynamic effects to come to the conclusion of the previous sentence. All you need to know is that the fly counteracts gravity through interaction with the air inside the jar.

>> No.10868718
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>> No.10870376
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>> No.10870811
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>> No.10870832

Didn't know pancake formalized that.

>> No.10872168


>> No.10872398

Henry path gave me a giggle.

>> No.10873296

Would anyone be interested if I tested this experimentally?

>> No.10873308

I'd be extremely interested in watching an anon get 0.5 kg of flies.

>> No.10873311

I was thinking of 10g rc helicopter

>> No.10873331

do it anon

>> No.10873353

Might do it tomorrow. Have to see how much the rc helicopters cost here

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