berkeman's latest activity
-
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... -
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. -
berkeman replied to the thread MCNP Beginner.Welcome to PF; it's good to have you here. :smile:
-
-
-
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...
-
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.
-
berkeman replied to the thread Humans evolved faster after farming, wheels and metal working arose.Whelp, we've shot that all to hell more recently... :wink:
-
berkeman reacted to Baluncore's post in the thread Point of particular Doonesbury strip? with
Informative.
You must not fight in the bar, but you may fight in the parking lot. You must leave the bar if you are prepared to fight, and you accept... -
berkeman replied to the thread Suspension on a kid's balance bike.No. I don't have a lot of experience with balance bikes (my kids learned on small bikes starting long ago before balance bikes), but I...
-
berkeman replied to the thread Undergrad Very high energy photons in space.Thread is closed temporarily for Moderation.
-
berkeman replied to the thread Greetings from an unqualified human.Welcome to PF! :smile:
-
I'm a fully grown adult human, not currently a student and not in academia. I have a strong layman's interest in physics and...
-
berkeman replied to the thread Random Photos.Very nice composition! :smile:
