Good point, but wouldn't the mirror then be orbiting the Sun slightly faster than the Earth and thus soon drift sideways ahead of it, in the absence of an additional retarding force? But perhaps some arrangement of slightly angled mirrors very close to the L1 point could counteract both the net...
It is widely accepted that global warming caused by accumulating greenhouse gases is happening and, as the late Isaac Asimov pointed out years ago, even if or when this is curbed, if the population remains at similar levels as now then just the waste heat from human activities will eventually be...
Besides a lot of waffle about formalism and terminology, I'd suggest one answer to the OP's question is that differentiation is a "local" operation at a point whereas integration is a more "global" operation across a range of points. It isn't a foregone conclusion that the first must be simpler...
Very interesting article - Just shows that humble, even discreditable, origins can have a commendable outcome.
Talking about essay contests, anyone know when is the next FQXi essay contest is likely to be announced? I've been checking their site http://fqxi.org/ for months, but so far not a...
I patched up the blog post toward the end, clarifying the fact that it must be _momentum_ that the black hole "observes/measures" precisely, in order to allow the position to be uncertain!
Because the position of mass-energy must be precisely "measured" at the singularity, this of course...
I hope a pointer to a speculative post on a blog is OK in this group. But as the posting rules at https://www.physicsforums.com/showthread.php?t=5374 reference a dead page, I was unable to check ;-)
(It would be easy to copy and paste that article here, if that is considered desirable to...
Use the Chinese Remainder Theorem to find an integer == 1 mod each prime < n and hence an integer == 1 mod (n-1)!.
Then adding to the latter integer a suitable multiple of (n-1)! yields an integer with the same property in the range [n, n!] (whose width is > (n-1)!), and every prime factor of...
I'm not convinced a wrong turn has been made. I think theoretical physicists are, in their various and most likely equally sound ways, struggling with various ramifications of more fundamental and probably embarrasingly simple principles, rather as a number theorist might make heavy weather of...