berkeman's latest activity
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berkeman replied to the thread Just a student! 🇨🇦.Welcome to PF, Gab. :smile: Great stuff (from a long time EE). All posts in the open forums should be in English, but anything goes... -
berkeman replied to the thread Collection of Lame Jokes.
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berkeman reacted to renormalize's post in the thread Graduate Quaternionic Rays instead of Complex with
Informative.
I don't know if it will be helpful, but the author has written an earlier, easily available paper on this this topic: GR-friendly... -
Oops! From FORTUNE: ‘Proceed with caution’: Elon Musk offers warning after Amazon reportedly had mandatory meeting to address ‘high...
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berkeman reacted to Steve4Physics's post in the thread Looking for lab experiments for a High School Physics class with
Like.
The coefficient of kinetic friction is generally a bit smaller than the static coefficient. Of course, the laws of physics may vary... -
berkeman reacted to bijuastro's post in the thread Graduate Why are the bulge particles coming out in the Gadget 2 simulation? with Like.
Thanks a lot, yeah it seems bulge particle velocities were high enough.
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Hey everyone! Here is a senior high school student. I am pretty into the essential principle behind the textbook's knowledge. Hope I can...
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berkeman reacted to .Scott's post in the thread Undergrad How many carriers for phased array? with Like.
I wasn't going to get into his theremin design. But if we do, why would we use a phase array instead of two or three directional...
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berkeman replied to the thread RIP Anthony J Leggett (1938 - 2026), superfluidity.A very long life well lived.
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berkeman reacted to robphy's post in the thread RIP Anthony J Leggett (1938 - 2026), superfluidity with Like.
https://en.wikipedia.org/wiki/Anthony_Leggett https://www.nytimes.com/2026/03/11/science/anthony-james-leggett-dead.html...
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berkeman replied to the thread Plastic Electric Kettle and Microplastic release.Hmm. I boil my water in a 2-cup Pyrex glass measuring cup in a microwave oven and pour that hot water over my coffee grounds in a...
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berkeman reacted to renormalize's post in the thread Undergrad How many carriers for phased array? with Informative.
A standard Theremin uses 3 oscillators, two working at about 260 kHz and one at 450 khz. Nothing oscillates at nearly a gigahertz. See...
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berkeman replied to the thread Undergrad How many carriers for phased array?.Yikes, you may be missing a minus sign or something there... :wink: From a Google search on VDE Level B at 3m test distance: So you...
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berkeman replied to the thread Undergrad How many carriers for phased array?.What is your planned transmit power in dBm? What is the maximum allowed RF level detected for Germany's Level A and Level B tested at 3...
