berkeman's latest activity
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berkeman replied to the thread I A question about the origin of Coulomb's law and point charge divergence.Thread is closed for Moderation. -
berkeman reacted to Baluncore's post in the thread Seeking Information on a WW II Era Westinghouse Gyro with
Like.
Where did I mention that? Gyro based gun stabilisers during WW2, only stabilised the vertical axis, pairs or triples were never used... -
berkeman reacted to Dr 118's post in the thread NASA Currently trying to build a rocket to launch into space with Like.
Thanks for the tip it's my first time using a platform like this
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berkeman reacted to mfb's post in the thread NASA Currently trying to build a rocket to launch into space with
Informative.
Space (100 km) is an extremely ambitious goal. There are only a few amateur teams worldwide that have achieved it. You'll need years to... -
berkeman reacted to cgsanderson's post in the thread I Question about photon entanglement and causality with Like.
Thank you!
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berkeman replied to the thread NASA Currently trying to build a rocket to launch into space.Welcome to PF. Your Profile shows that you are in the UK, so I did a Google search on amateur rocketry clubs in the UK and got lots of...
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berkeman replied to the thread Announcement RIP Vanadium 50.Any information we have about those is protected by PF's privacy policy. We would need to get the family's permission to discuss any of...
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berkeman reacted to JT Smith's post in the thread I'm trying to intuit how pull-up and pull-down resistors work with Like.
You can connect a microprocessor input directly to VCC or GND without worries as the impedance is very high. You need that resistor so...
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berkeman replied to the thread Enthusiastic Physics Learner.Yes, we have such a sub-forum under the Textbooks forum in the Education area. Give me a minute to get the direct link... Edit/Add --...
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berkeman reacted to symbolipoint's post in the thread Can someone identify this, from some New Orleans piano music? with
Agree.
I have heard a piece of new orleans piano music but I lost track and I do not know the name of it. All I know is that it was played on... -
berkeman replied to the thread I'm trying to intuit how pull-up and pull-down resistors work.There are a couple reasons for using the "single pole / single throw" SPST switch and resistor versus a "single pole / double throw"...
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On November 13, 2026, Voyager 1 Will Reach One Full Light-Day Away From Earth - nearly 5 decades after it was launched...
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berkeman replied to the thread I'm trying to intuit how pull-up and pull-down resistors work.Pullup/pulldown resistors and switches are commonly used as inputs to digital logic gates or other digital logic like microcontrollers...
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berkeman replied to the thread I Acceleration on an electric unicycle, how much does the rider have to lean?.What could possibly make those mismatch? Is there that much wheelspin when they are riding their EUCs? What kind of riding are they...
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