The Physics Behind the Thumb Trick

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From: Practical Engineering
Duration: 17:43
Views: 388,327

_Closed Conduit Hydraulics_ is a place where intuitions don’t always serve you well
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The garden hose is a backyard version of the same problem engineers and operators deal with every day: how much flow can you get through a real system, and what does it cost you in pressure?

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jlvanderzwan
3 hours ago
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"And "closed conduits" matter! Lots of essential parts of our lives depend on fluids moving through pipes."

( ͡° ͜ʖ ͡° )
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Saturday Morning Breakfast Cereal - Connection

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Click here to go see the bonus panel!

Hovertext:
All I'm saying is this would be the ultimate proof that God has a dirty mind.


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jlvanderzwan
16 hours ago
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"Fock space is a Clifford or Weyl [1] algebraic construction used in quantum physics to construct [2] the quantum states space of non-singular [3] identical particles [4] from a single particle Hilbert space H. It is named after Vladimir Fock who first introduced it in his 1932 paper [3] "Konfigurationsraum und zweite Quantelung" ("Configuration space and second quantization")"

https://en.wikipedia.org/wiki/Fock_space

"In computational complexity theory, PSPACE is the set of all decision problems that can be solved by a Turing machine using a polynomial amount of space."

https://en.wikipedia.org/wiki/PSPACE


I mean, we're talking about a field that calls its problems PSPACE-hard, so how much dignity does have to begin with?

Not to mention the fact that Turing machines and quantum mechanics already have a theoretical connection via Quantum Turing Machines. Which have complexity class "PP".

https://en.wikipedia.org/wiki/Quantum_Turing_machine

https://en.wikipedia.org/wiki/PP_(complexity)
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Utilitarianism and Its Enemies

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PERSON:
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jlvanderzwan
1 day ago
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I'll just copy/paste the extra text here because I don't want people to miss it (or the link to the Property Monster)

"Criticisms of utilitarianism often end up in a couple of camps, the first being extremely far fetched thought experiments, like the Utility Monster (which by the way, can be reversed on Nozick as a "property monster", which I came up with in this comic about: https://existentialcomics.com/comic/259). These push utilitarianism to its end, showing that it actually causes us harm. Kind of a poor criticism, since the whole point is to make us happy, the fact that it doesn't make us happy doesn't really work. Of course we all agree with the utility monster anyway, which is why we don't value the happiness of ants as equal to ourselves, we are the utility monsters. If some greater being came along, they would probably just laser us all to use earth as a beach house anyway, so we wouldn't have to worry too much about the failure of our philosophies to account for them."

"More to the point though, people like Nozick, who spend their career arguing why it's great and fine for the rich to exploit the poor, obviously don't have humanity's best interest in mind. Most utilitarians spend their time on earth trying to make life better for everyone, like arguing for women's rights, animal rights, and alleviating poverty. So yeah, take your pick I guess."
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Saturday Morning Breakfast Cereal - Tragic

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Hovertext:
Later he's upset that nobody's upset.


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jlvanderzwan
3 days ago
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How to convince Lex Luthor to actually help mankind.
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Disappearing Act

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jlvanderzwan
6 days ago
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Saving the last panel to use as a meme just in case some year somewhere in the distant future breaks the current streak of "this year looks bleaker than the previous one"
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Turing Test 2.0

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