berkeman's latest activity
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Launch window calendar: February 6, 7, 8, 10, 11 March 6, 7, 8, 9, 11 April 1, 3, 4, 5, 6, 30 Each day has a 120 minute launch window... -
berkeman replied to the thread Is mathematics invented or discovered?.Thread is locked temporarily pending Moderation of recent posts (some now hidden)...
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berkeman replied to the thread Random Photos.Kite surfing on a skateboard? Dat's a big parking lot!
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berkeman replied to the thread Hello everyone.Welcome to PF, Ellan. :smile: As @.Scott says, please be sure to translate your posts into English here. Thanks very much.
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From the PF Terms of Service: Language: All posts must be in English. Posts in other languages will be deleted. Pay reasonable...
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Hello Ellan: Try this (Romanian to English) Hello everyone, I'm Ellan, from Romania. I'm interested in classical electromagnetism and...
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berkeman reacted to russ_watters's post in the thread Can a flow created by a fan show an Edge effect when hitting a wall? with
Like.
Right. And these are forms of energy: kinetic energy increases, pressure energy decreases. That's the energy that gets traded from one... -
berkeman reacted to FactChecker's post in the thread Can a flow created by a fan show an Edge effect when hitting a wall? with Like.
There are other things going on. Please try to understand Bernoulli's equation, which gives the trade-off between pressure and velocity.
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berkeman reacted to A. Neumaier's post in the thread Undergrad Scattering Theory: Difference between use of scattering amplitude and Born approximation? with
Informative.
The latter is (as the name says) an approximation of the former, where only the first order term in the Born series is taken into account. -
berkeman replied to the thread What the heck is that thing?.LOL, I did a Google Images search on the picture, and it recognizes it as a handrail, but the only link to that picture is for some...
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berkeman replied to the thread What the heck is that thing?.This is my guess. Probably some artist did it mostly anonymously and hoped that it looked professional enough to not be taken down.
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Microgravity reshapes bacteriophage–host coevolution aboard the International Space Station Abstract: This uses well developed...
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berkeman replied to the thread New Approach To Tackle College Cost.So is this just for a BS Math degree, or will they offer degrees in some other fields?
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berkeman replied to the thread New member.Me too. :smile: Welcome!
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berkeman reacted to Alex A's post in the thread Normalization of MCNP F4:P photon flux tally to experimental counts with Informative.
Welcome to PF @Marinaromany, It might be possible to do that with an F4 and a cross section multiplier but F8:p,e is a better way on the...