berkeman's latest activity
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berkeman reacted to fresh_42's post in the thread Did they discover another descendant of homo erectus? with
Informative.
The study provides critical new insights into the African Humid Period, a time between 14,500 and 5,000 years ago when the Sahara desert... -
berkeman reacted to Baluncore's post in the thread I need a concave mirror with a focal length of 150 feet with
Haha.
You were lucky that time. You must always expect it to fall sideways, because maybe next time it will. I am sorry, but I have this... -
berkeman reacted to DaveE's post in the thread I need a concave mirror with a focal length of 150 feet with
Like.
Just hire a tree guy, dude. Your concave mirror isn't an antigravity device, pieces will still fall, but in a much less controlled... -
berkeman replied to the thread I need a concave mirror with a focal length of 150 feet.I'm definitely not an experienced tree feller, and for larger trees I would never attempt what I suggested. But for skinny little...
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berkeman reacted to Baluncore's post in the thread I need a concave mirror with a focal length of 150 feet with Like.
When you attach a single rope to a tree, in an attempt to pull it down in a preferred direction, it will usually fall left or right, at...
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berkeman replied to the thread I need a concave mirror with a focal length of 150 feet.Sorry, but I guess I'm a little dense today. You want to cut down a tree piece by piece with a mirror/lens from 150' away? That does...
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berkeman reacted to sbrothy's post in the thread How would you describe briefly your own mental modeling of chemistry? with
Agree.
Although I'm pretty sure any link to viXra will get you a virtual beating. :woot: EDIT: Possibly with the lead pipe without soft pellets. -
berkeman reacted to DeBangis21's post in the thread Announcement Please welcome berkeman as PF Admin with Like.
Congratulations!
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berkeman reacted to cianfa72's post in the thread Announcement Please welcome berkeman as PF Admin with Like.
Very good, congratulations !
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HMMMM ....
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berkeman replied to the thread Making a compressor from a steam engine or Tesla Turbine.What are your thoughts on those two questions?
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berkeman reacted to jedishrfu's post in the thread Physics, needing help with a discovery from a friend who died. with Like.
Dear Marc, We are deeply sorry to hear about the passing of your friend. Please accept our heartfelt condolences during this difficult...
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berkeman replied to the thread How would you describe briefly your own mental modeling of chemistry?.Not really, depending on the situation. For non-controversial subjects, Wikipedia is often a good initial reference (and most of the...
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berkeman reacted to renormalize's post in the thread How would you describe briefly your own mental modeling of chemistry? with Like.
Actually, I routinely post links to Wikipedia without issue. Have I just been lucky?
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berkeman reacted to JimWhoKnew's post in the thread Announcement Please welcome berkeman as PF Admin with
Care.
When I posted my first question on PF, slightly over a year ago, I needed help with it. My instincts lead me to ask @berkeman, and it...
