Next tag badge:
118/100 score
19/20 answers
4 67 148
 Nice Answer
~1.6m people reached

comment Something about equipotential lines for prospecting
Currently this post isn't even a question, much less a good one. However, you should take note of our homework-like questions policies:…?…?
comment How to scale variables in a classical Hamiltonian?
We have MathJax working on the site., so you shouldn't post pictures of hand-written equations. See and . Please.
comment Extending the reach of a crocodile clip for Kelvin Water Dropper experiment
It would probably help to link to a simple description of the experiment (the version that you are doing if possible) because while I know I've heard of this bit I can't bring the details to mind. Second, the photograph is a useful reference, but having a labeled schematic as well is generally helpful for people trying to understand the photo (and to establish a uniformity of jargon in the answers).
comment What does the finding of gravitational waves mean for M Theory?
You can answer questions like "I was wondering if the finding of gravitational waves proves M theory." for yourself very easily. Re-phase it as "Is M theory the only theory that predicts gravitational waves?". (This really leaves aside the whole question of how you should understand "prove" in a scientific rather than mathematical context, which is a whole 'nother kettle of fish).
comment Normal Force in Circular Motion
Closely related:… The key here is that you haven't really understood the properties of the normal force. My answer to the linked question may help with that.
comment The relativity of gravity: If mass is relative how much gravity do I experience?
comment What actually is the event that we think we have detected with gravitational waves?
It's worth noting that these guys have almost certainly been orbiting each other for ages, radiating undetectably small amounts of energy and slowly spiraling in. The strength of the waves and radiated power increasing as they grew closer together. The event that lasted less than a second was just the cataclysmic finale to a drawn out ballet.
comment Special relativity and uniform circular motion
Possible duplicate:…
comment Special relativity and uniform circular motion
This is just another variation of the twin paradox with a different acceleration schedule than usual. And the answer is the same as it always is: B also sees A's clock tick slowly. Though it is worth noting that "sees" in these discussion refers to the computed actual time of even (in a frame) rather than to the time of light arrival.
comment Relativity gedanken experiment
Orbital speed gets slower as the radius of the orbit increases when gravity is the central force.
comment Can electron capture occur with an external electron?
OK. In that case I've edited the text to one that I think better reflects the intent. And I can endorse Bill's answer below.
comment Is there any property of a neutrino that prevents it from being considered the missing monopole that will make Maxwell's equations symetric
"Magnetic charge is measured in Webers." No. It's not. The Weber is a unit of magnetic flux. And the magnetic flux density is $\mathrm{Wb/m^2}$.
comment Why is the centripetal acceleration direction only correct for small velocity differences?
As an aside there is an old hack that lets you use non-trivial parts of the circle (in fact it is usually invoked over one full turn), but it involves computing the distance covered by the position and velocity vectors in the same way (and one that might not be obvious at first blush).
comment What does the presence of gravity waves show?
BTW "gravity wave" described a fluid surface wave where the restoring force comes from gravity. What LIGO announced was the first observation of "gravitational waves". A detail that might have help your search.
comment How LIGO is calibrated?
I haven't read the technical documents, but it seems obvious that they use a negative feedback circuit to continually null the signal over time scales of a few tens of seconds. That scale is much slower than the signals they are sensitive to (so it doesn't interfere with getting the data) but much faster than issues like thermal variation on the arms and other environmental variations (so that the system is always in a usable state). @CuriousOne tried to point that out by talking about bandwidth but you may not have followed that point.
comment Can Newton's law of gravitation and Einstein's GR be considered true and complete laws of gravitation?
I believe that you're ready for our advanced class...
comment Are there any known non-zero mass objects travelling at almost $c$ observed in the universe so far?
Every time you open your eyes.
comment Where does gravitational waves' energy go?
What makes you think it has to get transferred back to anything? most of the light energy radiated by the sun never gets transferred back either. So what?
comment Are ergs commonly used in astrophysics? If so, is there a specific reason for it?
I suspect that Schrawzchild's book may have something to do with it. It dates from a period when cgs units were very common throughout science and remained a go-to text for decades into the (nominal) SI era.
comment Now that gravitational waves have been discovered, what does their particle version look like?
The same thing it looked like last week. Seriously. We had this theory; it could be written in several ways. It made some prediction. Another one of those predictions was borne out experimentally (many others have already been done). But that doesn't suddenly change the theory or the previously completed work.