berkeman's latest activity
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73 year old retired electrician/contractor, married to the same wonderful woman for 47 years. "The Big Three" interests are old guns... -
They are the 'not without electronics' ones. A small Li-ion battery (at 3.7V) with a charging electronics and a step-down converter (to...
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berkeman reacted to Dale's post in the thread Undergrad Why is SI taught in US university physics courses instead of cgs? with
Informative.
Maxwell's equations are different in SI vs CGS units. The best source for that is this table from Wikipedia... -
berkeman replied to the thread Thread information missing in first four General Discussion threads.Yeah, the redirects work but take you to the first post in the threads. Instead, just go to the Fun, Photos and Games Forum and they if...
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berkeman replied to the thread Thread information missing in first four General Discussion threads.I think those were moved today to a subforum under GD (Fun, Photos and Games Forum). I'll check that the redirects are okay now...
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berkeman reacted to sophiecentaur's post in the thread Undergrad Why is SI taught in US university physics courses instead of cgs? with
Haha.
We're slowly inching our way to a conclusion here. -
I ended up here looking for an answer to a question and am extremely grateful for the prompt and informative answer. I'm neither...
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berkeman reacted to DaveE's post in the thread Optical-EME for licensed amateur radio operators with
Like.
Cheap. They put energy into skin with the precision requirements of a doctor. In the mid 1980's I worked on a 532nm Q-Switched laser... -
berkeman reacted to ohwilleke's post in the thread What did you do with your old college textbooks? with Like.
Three plus decades later, I still have almost all of them (and even consult them now and then), over the objections of other members of...
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berkeman reacted to DaveE's post in the thread Need advice and hints for working with helium with Informative.
Could you use the valves temporarily to seal the vessel long enough to remove the plumbing and replace it with a mechanical seal, like a...
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berkeman replied to the thread Random Photos.I've used intercom systems between streetbikes and even between me and my passenger on a streetbike (full face helmets with lots of wind...
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Thank you jr!! That is greatly appreciated. No sir, I don't know the lead is ruined but I'll have to cut the furnace apart to salvage...
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berkeman replied to the thread Undergrad Why is SI taught in US university physics courses instead of cgs?.Can you give a couple examples where using cgs units helped you in your understanding of Physics versus using SI units? Thanks.
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Welcome to PF. The surface color could be a lead / antimony / tin oxide. Are you sure that the lead is ruined? Did a measurable...
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berkeman replied to the thread New member seeking expert advice in particle physics.Welcome to PF. Please keep in mind that we do not allow discussion of personal theories or speculation. All discussions must be based...
