1,101 reputation
212
bio website mathandcode.com/portfolio
location
age 20
visits member for 1 year, 7 months
seen 12 hours ago

Mar
4
comment Work producing current = energy stored in the magnetic field?
Add a "for an idealized inductor with no resistance" somewhere. Not everyone has circuits on the mind!
Feb
22
comment Numerical solution of two coupled second order differential equations of motion
This is more like a first order equation - treat your variables as $\dot{x}$ and $\dot{y}$. (it IS a first order equation in $\dot{x}$ and $\dot{y}$.)
Feb
20
comment How to simulate a full-suspension bike?
A few questions for background: Are you asking "what model is best" or "how do I apply physical laws to a model"? Are you familiar at all with the Lagrangian formulation of Newtonian mechanics? And how would you propose one model the rider? Anyways, the first step is parameterizing the bike - what are all the important variables and spatial relationships between them. eg, finding the position of the rear wheel given a front wheel position and hydraulic compression amount. There is little physics involved in that step - mostly taste and geometry.
Feb
19
comment Why light can't go faster then 300 000 km/s? What prevents it?
There is also physics.stackexchange.com/q/92079/12029 which isn't quite a duplicate but is very close.
Feb
14
answered Is the Doppler effect for sound symmetrical for observer or source movement?
Feb
3
comment What is difference between Acceleration due to gravity and Gravitational field intensity near the Earth Surface?
-1. Please clarify your definitions of "gravitational intensity" and "gravitational acceleration". With the definitions I'd go with (g-field as the sum of all fields produced by all point masses) the statement "it does not imply that the gravitational acceleration of any [point] mass at that point is equal to E" is false. (the field produced by the point mass itself is ignored)
Feb
3
comment Collision of multiple fluid flows at a point
youtube.com/watch?v=kvRg9NuO9Oc it seems like the key phrase to google for is "impinging fluid jet"
Jan
31
answered Do we apply electrostatics correctly?
Jan
31
awarded  Enthusiast
Jan
30
comment Pseudo Force Other Than Centrifugal Force In A Rotating Frame
If you apply the transformation in full generality you get the centrifugal force and the coriolis force, as derived at: physics.stackexchange.com/q/383
Jan
28
comment Time dilation and relativity
please unaccept my answer - I misread your question. gregsan's answer is correct.
Jan
28
revised Time dilation and relativity
added 156 characters in body
Jan
27
answered Time dilation and relativity
Jan
25
comment Non-Conservative Behaviour of Static Electric Field
let us continue this discussion in chat
Jan
25
comment Non-Conservative Behaviour of Static Electric Field
@rijulgupta So I am right. The formulas in "Theory" in your blog are wrong. You didn't use those formulas in the rest of the post, so it must be a typo and is not the source of your error.
Jan
25
comment Non-Conservative Behaviour of Static Electric Field
Spent a small amt. of time (so it's possible I made an algebraic error) but please try to replicate my results or post a full derivation of those equations.
Jan
25
comment Non-Conservative Behaviour of Static Electric Field
I think your equations for $E_{\bot}$ and $E_{\parallel}$ are incorrect. The derivation of the equation on hyperphysics.phy-astr.gsu.edu/hbase/electric/elelin.html does have sine and cosine terms (yes they are with respect to different angles than your diagram) but there's still an extra factor of $z^{-1}$! I also tried to calculate the divergence of your field and got $((p+x)^2+y^2)^{-1/2}-((p-x)^2+y^2)^{-1/2}$ where $p=L/2$ (by plugging in dot/cross product formulas for the sine and cosine), indicating there's a space charge.
Jan
21
comment Ice bath is always 3C, why?
@Dov You probably don't have to worry about that: what-if.xkcd.com/71
Jan
19
comment Why do people with bigger hands/wrists have bigger torque advantages in arm wrestling?
Could you supply more information on the muscle group tests?
Jan
18
comment Is the concept of a field necessary to electrodynamics?
"This is not in line with reality" seems too bold without further analysis/references/discussion. Calling one of two equivalent mathematical descriptions more "real" leaves a sour taste in my mouth.