Recent content by sarbot

Actually Dazza95 is more correct. The inverse square law applies even in real world applications where the magnet is sufficiently asymmetrical to represent a "virtual" monopole. Here is a link to an experiment which proves this assertion. The "bar magnet" in this experiment had an aspect...

All my measurements are 20 mm apart on 3D cartestsian coordinates, so I decided to define Z as 20 for all Z datapoints for the 1st plane, and Z=40 for all Z datapoints Z in the second plane, and so on, and that for each data set I define an X,Y coordinate like 0,0 as the origin, and then -1,0 is...

Hmmmm, Yes, this phrase is wrong: "We know that 1 mg. per liter is 1 ppm, so 0.000104 mg. would be 0.000104 ppm, close to 0.104 ppb, or 104 nanomolar." I should not confuse molar mass with actual weight. The phrase above could end with 104 ppt (trillion). Hmmm, it seems...

I don't know if I made a mistake - - that's why I'm asking for others to check out my calcs. I cannot see any mistakes in the line that Borek shows. Anybody up to the challenge ?

Appreciate some backup, checking my calculations to see where I messed up - - it's been 30years since college chemistry: Let's say I have a compound X which has a molecular weight of 320, so, 320 grams = 1 mole. Next, I have a 1% stock solution A of that compound X (1 gram...