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russ_watters's latest activity
russ_watters
reacted to
Averagesupernova's post
in the thread
B
Why does a coin take 2 full rotations around another coin?
with
Like
.
Have you actually read this entire thread?
Yesterday, 1:45 PM
russ_watters
reacted to
Baluncore's post
in the thread
What is global warming due to?
with
Like
.
The debate is over. We have had many ice-ages since the dinosaurs. The continents have drifted to, and from the poles, along well known...
Yesterday, 6:23 AM
russ_watters
reacted to
Dale's post
in the thread
I
Question Regarding Force Being Equal, Even Moving Upwards (if V=0)?
with
Like
.
Your perceived effort is a very poor measurement of force. It is exceptionally difficult for humans to do constant velocity motions or...
Tuesday, 6:40 PM
russ_watters
replied to the thread
Evaluating Motor Specifications for a Conveyor
.
It's common for shorter/smaller conveyors to assume a high friction coefficient of .75-1 on which to base the motor size. That's a lot...
Tuesday, 3:58 PM
russ_watters
reacted to
Janus's post
in the thread
I
It's still not clear to me what's the limit of light propagation
with
Like
.
"Tends to" but never reaches. It's like the equation y= 1/n, it tends to 0 as n approaches infinity, but since n can never reach...
Tuesday, 11:26 AM
russ_watters
reacted to
Ibix's post
in the thread
I
It's still not clear to me what's the limit of light propagation
with
Like
.
No it doesn't. If the probability per unit area of being hit by a photon is ##p## when the circle has radius ##r## then the probability...
Tuesday, 11:25 AM
russ_watters
reacted to
Klystron's post
in the thread
Is the criteria for the present perfect tense in textbook inadequate?
with
Like
.
Simple response to the question posed in the thread title: yes, the criteria for [using] nearly every tense in English is inadequate. To...
Tuesday, 7:01 AM
russ_watters
reacted to
Ibix's post
in the thread
Gravity Based Electricity Generator
with
Like
.
I would say that whatever is lifting the weight is the energy source. This is a battery (if you store the input energy for later) or a...
Monday, 6:50 PM
russ_watters
replied to the thread
Gravity Based Electricity Generator
.
You're still approaching the problem backwards. You need to figure out or specify how much mechanical energy/power you have available...
Monday, 6:49 PM
russ_watters
reacted to
Ibix's post
in the thread
Gravity Based Electricity Generator
with
Like
.
It's not unrelated to weight-driven clock mechanisms. In that case the clock owner winds the clock to lift large weights which then fall...
Monday, 3:08 PM
russ_watters
replied to the thread
Gravity Based Electricity Generator
.
Fair enough, guys. Elevators too. What triggered me is that lack of understanding of mechanical advantage is the secret sauce in that...
Monday, 3:05 PM
russ_watters
replied to the thread
Gravity Based Electricity Generator
.
BTW, I'm willing to humor the OP for a bit because they seem willing to learn but this still looks like the old classic pmm to me...
Monday, 2:32 PM
russ_watters
replied to the thread
Gravity Based Electricity Generator
.
The wiki might be enough. It's a pretty simple/straightforward concept: https://en.m.wikipedia.org/wiki/Mechanical_advantage The key...
Monday, 2:27 PM
russ_watters
reacted to
Borg's post
in the thread
The Jet Pak is Real
with
Like
.
If they could get rid of the need to stabilize with the arms, you could shoot while flying. Maybe if they were linked to the upper arm...
Monday, 11:34 AM
russ_watters
reacted to
Borek's post
in the thread
The Jet Pak is Real
with
Like
.
Similar ones are also tested for search and rescue operations, so probably pricing is not that prohibitive.
Monday, 11:34 AM
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