berkeman's latest activity
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berkeman replied to the thread Graduate Practical demo - Ferromagnetic attraction at interpole boundary.It looks like they are called "Spiral Shank Nails", and the grooves afford superior holding power for the nails: I don't think the... -
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berkeman replied to the thread Point of particular Doonesbury strip?.It's probably similar to the situation with EMS providers, but would be even worse for soldiers if they saw a lot of combat. In EMS we...
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berkeman replied to the thread Weird News Compilation.https://abc7.com/post/3-southern-california-residents-sentenced-bear-suit-insurance-fraud-scheme/18907444/?fbclid=IwY2xjawRPf-VleHRuA2Flb...
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berkeman replied to the thread Q: identify logos?.The first looks like Integrated Device Technologies (IDT), but it sounds like you already know that one. Interesting that they were...
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berkeman reacted to pasmith's post in the thread Modeling a graph that shows age in relation to depth of an ice sample with
Like.
Responses, like the original post, should be typed and make use of LaTeX rather than screenshots. -
berkeman reacted to BillTre's post in the thread Humans evolved faster after farming, wheels and metal working arose with Like.
Rates of recent human evolution have been the subject of threads here several times. Here is a AAAS news article. It is based on this...
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berkeman replied to the thread Graduate Practical demo - Ferromagnetic attraction at interpole boundary.Correct. If the B field is constant in a region enclosing a ferrous object, there is no net magnetic force on the object. There is a...
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berkeman reacted to Vanadium 50's post in the thread High School Calculating Force on an Iron Object with Magnetic Field with Like.
If the field is uniform, there is no force on a piece of iron. The force is proportional to the gradient of the field.
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berkeman replied to the thread MCNP Beginner.Welcome to PF; it's good to have you here. :smile:
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berkeman replied to the thread Modeling a graph that shows age in relation to depth of an ice sample.Keep in mind that we generally do not allow folks to do the OP's schoolwork for them, but in this case the thread is old enough that the...
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berkeman replied to the thread Undergrad Very high energy photons in space.After a Mentor discussion, this thread has run its course and will remain closed.
