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Mar
15
answered Air drag coefficient value
Mar
15
comment Energy Measurements in a Two Fermion Double Well System
I wonder if you could identify any specific way in which the OP makes this point clear? Is it the part where he quotes Sean Carroll talking about two electrons in two atoms?
Mar
14
comment Energy Measurements in a Two Fermion Double Well System
It's hard for me to understand how your other correspondents could have given such detailed answers without explicitly taking note of this condition.
Mar
13
answered Energy Measurements in a Two Fermion Double Well System
Mar
13
answered Factors affecting torque and RPM of a motor
Mar
12
answered Evidence that “space exists rather than just particles”
Feb
27
comment Why was PACER abandoned?
maybe so but I still think I was right about the 2 billion.
Feb
27
comment Why was PACER abandoned?
So is our dollar, for that matter.
Feb
27
comment Why was PACER abandoned?
You're neglecting the fact that I live in Canada, and our gallon is different.
Feb
26
answered Why was PACER abandoned?
Feb
11
comment Is there a physics Puzzles site like Project Euler?
Those problems seem to have ended back in 2004. Are they still posting new ones somewhere?
Feb
3
comment Vibrational motion of linear diatomic molecule
I think for similar reasons the non-adjacent transitions in CO are also not excited. There is no dipole moment coupling the ground state to the third excited state, or the fourth state to the eleventh.
Feb
3
comment Can the Lorentz force expression be derived from Maxwell's equations?
Thanks, Greg. I had an extra backslash at the end. It's OK now.
Feb
3
revised Can the Lorentz force expression be derived from Maxwell's equations?
deleted 1 characters in body
Feb
3
answered Can the Lorentz force expression be derived from Maxwell's equations?
Feb
2
comment What is a strain gauge and how do I use one?
dmckee, I con't object to your writing whatever you want to write, but I've read it again, and like I said the first time, it still seems pointelssly hostile to the point of being bizarre. The conversion between microstrain and microvolts is no accident, and I don't remember at which excitation it becomes exact, but my point was that you're not going to get anything useful out of a wheatstone bridge with a $29 multimeter. I don't think that's fiddly stuff to keep the students busy, whatever that's supposed to mean.
Feb
1
comment What is a strain gauge and how do I use one?
I find dmckee's comments to be pointlessly hostile to the point of being bizarre. The question asked how do you use strain gauges. I explained how to wire them up in a wheatstone bridge, and pointed out the need for a voltmeter that goes to five digits. What exactly is fiddly about that?
Feb
1
answered What is a strain gauge and how do I use one?
Jan
28
comment Reflectance of Round Moon vs Flat Moon
Oh, it's not just you. People do it all the time; I just like to keep a record. Did we cross paths in physicsforums.com? I used to be "conway".
Jan
28
comment Reflectance of Round Moon vs Flat Moon
It's a small point, but when I edit a one of my answers I like to leave the wrong answer there and and the corrections under the title "EDIT:". I think the conversation makes more sense that way. But in any case thanks for working it out!