berkeman's latest activity
-
berkeman reacted to DaveE's post in the thread High School Reducing loss of energy for Lasers with
Informative.
Do you mean the laser beam, or the entire laser? What's in the vacuum? There are some laser applications that require a vacuum, but... -
What can I say. That 'somewhat' may be doing a bit of heavy lifting there, but certain... dark desires have started to stir in me...
-
@sbrothy :wink:
-
berkeman replied to the thread Basic skills that kids are lacking.From your Profile/About page: :oops:
-
berkeman replied to the thread High School Reducing loss of energy for Lasers.@Josiah -- Please take care not to try to reopen a closed thread. Your previous thread on this question was closed because you veered...
-
I always wanted to learn how to read, but I've only ever seen it in books... :oldbiggrin: I write checks every month: water bill...
-
My older sister whom I am now taking care of.
-
berkeman reacted to Astronuc's post in the thread M 7.5 Earthquake - 28 km SE of Yumare, Venezuela with
Like.
There are usually foreshocks, but often not nearly as severe. Here what is rare is the occurrence of magnitude 7.2 then 7.5 in close... -
berkeman reacted to yantrigo's post in the thread Introduction about myself as a new member of physicsforums with Like.
Hello there, I'm a college student. My interests are deeply rooted in physics, maths, & robotics. My hobby is tinkering with machines...
-
I have seen maintenance failures where the equipment vendor document said "clockwise," meaning "clockwise from above" whereas the tech...
-
Well - oh my stars & garters! I'm published! (Five maritime-themed short stories of fantastical fiction set in the deep past, present...
-
berkeman replied to the thread Collection of Lame Jokes.
-
-
berkeman reacted to anuttarasammyak's post in the thread An intuition I had about infinite numbers -- Is it valid? with Informative.
Yes. For an example, let p, q, r be prime numbers. There are infinite number of prime numbers. Infinite number of sets...
-
berkeman replied to the thread Basic skills that kids are lacking.Question from the Mentors to the Advisor's Lounge folks: Should this thread be moved to GD? Is there a need to keep it private in the...
-
berkeman replied to the thread Realta Fusion claims electrical generation from plasma!.Huh, I think you're right. So they just created a plasma pulsing between their mirrors and then pulled energy back out of the pulses...
