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Jun
29
reviewed Approve Why is gravity so hard to unify with the other 3 fundamental forces?
Jun
29
reviewed Edit Calculation of OPE in Polchinski
Jun
29
revised Calculation of OPE in Polchinski
Add homework tag
Jun
28
comment Can gravity in principle be made to flow through a “wire”?
What about a waterfall?
Jun
28
comment Acceleration derivative
Your last equation is dimensionally incorrect.
Jun
28
revised Acceleration derivative
Formatted the quote
Jun
28
reviewed Reject Conceptual rolling
Jun
28
comment Estimate the amount of atoms in the smallest speck of matter you can see with the naked eye
1) How did you transform volume to amount of atoms? 2) Why did you pick a sphere, and not just a disk-like volume?
Jun
28
comment Numerically summing a divergent series
Also, I think this question would be much more appropriate on Computational Sciense SE.
Jun
28
comment Numerically summing a divergent series
@grdgfgr The point is that you get an "arbitrary" result based on the amount of terms and resolution. Analytically you might be able to say something useful when taking limit to 0 or $\infty$, but numerically you can only take limits to very small or very large (system precision). This is just not the same thing.
Jun
27
reviewed Edit How do you know when you need to use distributions to represent charge densities?
Jun
27
revised How do you know when you need to use distributions to represent charge densities?
Removed thanks
Jun
25
reviewed Approve Gough-Joule effect in rubber band
Jun
24
comment Moment of Inertia of Water.
Do you know how to calculate the center of mass of two point masses? And three point masses? See where this is going?
Jun
22
reviewed No Action Needed When potential difference is equal to the emf, isn't the current 0?
Jun
22
reviewed Approve Weather Meridians
Jun
21
revised Can we find actual rest mass of things on Earth
deleted 16 characters in body; edited title
Jun
21
reviewed Leave Open meteorite-like impact of a drop of yogurt
Jun
20
reviewed Approve Drift velocity in Silicon wafer
Jun
20
reviewed Edit How is current produced in semiconductors or metals?