berkeman's latest activity
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berkeman replied to the thread Writing: Input Wanted Looking for story advice on ancient aquatic reptile breeding grounds.Paging the obvious PF subject matter expert @BillTre (well, at least for current aquatic animals)... :smile: -
berkeman reacted to TSny's post in the thread I Gauss' law seems to imply instantaneous electric field propagation with
Like.
Yes. Thank you. -
berkeman replied to the thread I Gauss' law seems to imply instantaneous electric field propagation.It looks okay now, right?
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berkeman reacted to Paul Colby's post in the thread I How feasible is home radio astronomy? with Like.
So, the plot shown in post #55 shows a peak. How many dB above the background is it? I ask because RTL dongles have pretty high noise...
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berkeman replied to the thread Physics Need some advice! (making a physics YouTube channel).If you haven't done so already, have a look through the threads in our Educators and Teachers forum. There are lots of good threads on...
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berkeman replied to the thread Physics Need some advice! (making a physics YouTube channel).Welcome to PF. What is your academic background in Physics?
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berkeman replied to the thread I How feasible is home radio astronomy?.In your link, they use a "9.3 meter solid surface satellite dish"...
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Thanks! The reflected distorted vertical lines originate from the reflected building's structure. The windows are not perfectly flat...
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berkeman reacted to palaphys's post in the thread Multiple reflections in a mirror system with Like.
oh I forgot to count the reflection at M1. so this is the mistake in my solution. However if there were no constraints on the number of...
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Good. Yes, I think so. Your two different graphical solutions with three reflections are very insightful!
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berkeman replied to the thread Collection of Science Jokes P2.
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berkeman replied to the thread Random Photos.Nice pictures. :smile: What are the vertical blind patterns in the highrise windows?
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berkeman reacted to Klystron's post in the thread RIP Jane Goodall (91), primatologist and conservationist with
Love.
I have a Jane Goodall anecdote that I think about often during these strange days. While visiting at Stanford University in Palo Alto... -
berkeman reacted to Astronuc's post in the thread Coccidioidomycosis, deadly fungal disease, no effective cure with
Informative.
https://grist.org/health/valley-fever-arizona-fungus-climate-change/
