berkeman's latest activity

Welcome to PF. Please be sure to read the PF rules, including the limitations on how you can use AI to post here. We also do not allow...

Our resident Chemist and mentor is also Polish @Borek

HI I'm a chemist, but I'm also interested in other fields of science. I often browse science news on phys.org and sometimes check out...

Woo-wee! Welcome to PF. It's great that you are so curious and interested in science topics at your age; keep it up! :smile: For...

BTDT, so I'm speaking from experience. You need a sufficient safety factor in the torque calculation. I suggest calculating torque...

Thank you both for the excellent replies. Very clear and awesome answers.

I think there are possibilities for such a configuration, but that it is too complex for an untrained brain to model immediately as a...

Refrigerator bought new in 2002: 39 Kwh/month. Newer refrigerator bought 2011: 35.8 Kwh/month. Data is from a Kill-A-Watt power...

4225kg or 4225N? What kind of bearings? What friction numbers are we talking about from the bearings? What will you use to hold/clamp...

I'm seeing straight-cut gears and differentials, but I'm not seeing anything that would imply continuous variability of the input/output...

Hi, all. New member jk137 here. I'm a retired materials physicist. Despite being retired I continue to embrace my inner physics nerd.

A little more Medic humor. And yes, I've been in a number of fire stations at dinnertime (not for dinner though). :smile:

(I don't know) Where did you get this idea? It sounds very strange and this isn't in the manual, but if the run actually uses the...