berkeman's latest activity
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berkeman reacted to Zaciekawiony's post in the thread Undergrad Difficulties in Measuring the Contact Angle of a Sessile Droplet with
Informative.
There's a technique for determining the contact angle that relies on measuring the droplet aspect ratio. I don't know how useful it is... -
berkeman replied to the thread Engineering Engineering Timber Beam Stress Calculation Help.Holy smokes! You have a 550 pound load on top of that bunk bed? At the very least, your anti-racking bracing looks pretty inadequate...
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berkeman replied to the thread Engineering Engineering Timber Beam Stress Calculation Help.Welcome to PF. Do you have any diagrams or pictures of this bed? I'm not familiar with the term Captain's Bed, so I did a Google...
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Can @DaveC426913 relate to this, I wonder? 🙂
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berkeman reacted to AlexB23's post in the thread Automotive Continuously Variable Transmission Idea with
Like.
Simple rule: When the OP does not come back, he realized his idea fell flat. -
berkeman reacted to Demystifier's post in the thread Graduate Six Textbook Mistakes in Quantum Field Theory with Informative.
I think there were a few, but I can find only this one: https://www.physicsforums.com/threads/quantum-mechanics-myths-and-facts.143045/
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berkeman reacted to renormalize's post in the thread Undergrad Particle field strength and sensitivity with Like.
Can you cite a credible textbook reference that supports those claims?
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Hello everyone, I am an astrophysics enthusiast interested in galaxy dynamics and the study of dark matter. I have recently been working...
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I get a lot of chess puzzles coming in on my social media feed. Most are of the form, "Black to move. Mate in 2!" which I read in my...
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berkeman replied to the thread Curious Man.I don't think any of that will be an issue for him.
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berkeman reacted to JimWhoKnew's post in the thread High School Looking for an English translation of Levi-Civita's 1926 paper "Sur l'écart géodésique" ("On the geodesic deviation") with Like.
It seems that parts of the paper are Italian-to-French translation of the first edition of the book, so they are almost identical to the...
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berkeman reacted to Astronuc's post in the thread Graduate Soft condensed matter physics with Informative.
https://en.wikipedia.org/wiki/Soft_matter I'm wondering how this applies to metal, or more particularly, to alloys with a homologous...
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berkeman replied to the thread Expansion or compression -- which is more energy efficient?.Yes. He has a long history here of posting about PMMs and Over-Unity mechanisms, even though he usually would not admit it. His...
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berkeman reacted to Andy Resnick's post in the thread Undergrad Water ripples project help please with Informative.
You are studying a very complicated topic, primarily because the air-liquid interface is free to deform and not a boundary condition. I...
