berkeman's latest activity
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berkeman reacted to Ken Fabian's post in the thread Artemis 2 launch - humans return to the Moon after 54 years with
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You sure the sun is behind the Earth in this pic? Remarkable colour photography of night-side if that is the case. More usually we would... -
berkeman replied to the thread Artemis 2 launch - humans return to the Moon after 54 years.Just a friendly reminder that PF is a science forum and conspiracy theory nonsense does not belong here. Enough said (hopefully).
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berkeman replied to the thread Interpreting VIA PCB characteristics through TDR and TDT.What you show is a 3-layer PCB, which is not used in practice. This point made by @Baluncore should be emphasized. It is generally a...
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berkeman replied to the thread Marcus Jensen.Welcome to PF. It's great that you are so interested in Science at such a young age. :smile: Please be sure to read the PF Rules (see...
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berkeman reacted to Baluncore's post in the thread Interpreting VIA PCB characteristics through TDR and TDT with Like.
You have two tracks with known impedance, joined through the PCB by a short cylindrical via. The via will probably not match the...
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No it isn't. That looks like a launch from complex 40 (Falcon 9) not 39B, but in any case that picture is quoted in a post by Chris...
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I look at pictures of the Artemis II launch taken up close, like this one: and I'm amazed by how much energy and resources have to be...
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Welcome to PF. This is a problem of understanding how the circuit works, assuming perfect components. If you specify the frequency...
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berkeman replied to the thread Engineering Half wave voltage doubler.Welcome to PF. This basic schoolwork question does not involve detailed values like frequency and parasitics. It is just a basic...
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Thank you! I was really debating on ordering a new Geiger counter straight from the manufacturer to recheck my house but I think I will...
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berkeman replied to the thread Union Micro-Macro.Welcome to PF. :smile: (Please take care to translate your posts into English. Thank you.)
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berkeman reacted to mfb's post in the thread Artemis 2 launch - humans return to the Moon after 54 years with Like.
Apogee raising burn is in progress. This will give them an orbital period of one day, enough time to fully test everything before...
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berkeman replied to the thread First Time Here!.Welcome to PF. :smile: We don't allow political discussions here, so you are in the right place. Enjoy PF! :smile:
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Hello this is my first time here, I was looking for an alternative to reddit as It was much too politically motivated and aggressively...
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berkeman replied to the thread Random Photos.I saw this in a downtown community bulletin board today (small community in the Santa Cruz mountains). What is wrong with this picture...
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