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age 19
visits member for 2 years, 1 month
seen Apr 11 at 15:32

I study physics, mathematics and informatics at Utrecht University in The Netherlands. I have participated in the International Physics Olympiad 2013. I also like to participate in programming contests, such as the Dutch and International Codecup, and the Informatics Olympiad. I usually use C++ but I know all of the following languages to a larger or lesser extend:

  • C/C++
  • Java
  • C#
  • JavaScript
  • PHP
  • BlitzBasic/Blitz3D/BlitzPlus
  • (HTML4/CSS)
  • A (tiny) bit of ASP.NET

During programming, Google, and existing StackOverflow-posts are my biggest friends!


Aug
1
awarded  Yearling
Mar
28
awarded  Scholar
Mar
28
accepted In general, can a Lagrangian density depend on space-time explicitly?
Mar
28
comment In general, can a Lagrangian density depend on space-time explicitly?
Actually, going over my derivation a couple of times, I think I have convinced myself that the remaining problems are just a question of mixing up my partial and total derivatives. I also had a little trouble with whether the boundary term disappears in a partial integration, so if I can't figure that one out, I'll spawn a new question. But other than that, I think it's clear. Thanks for your help!
Mar
28
comment Is a vector and a unit vector dimensionless
@BinaryGeek see my edit
Mar
28
revised Is a vector and a unit vector dimensionless
added 227 characters in body
Mar
28
answered Is a vector and a unit vector dimensionless
Mar
27
comment In general, can a Lagrangian density depend on space-time explicitly?
Alright, we can apply Noether's theorem to derive the energy-momentum tensor precisely when the Lagrangian density does not have an explicit space-time dependence. That makes sense. As for the second question, when I have more time at hand I'll try to make it a little clearer what exactly I have trouble with in the derivation. Thanks for now :)
Mar
27
awarded  Student
Mar
27
comment In general, can a Lagrangian density depend on space-time explicitly?
@Qmechanic, thanks for the edit. I actually typed this up on my phone, so it might not be as clear as it could have been.
Mar
27
asked In general, can a Lagrangian density depend on space-time explicitly?
Sep
24
awarded  Autobiographer
Aug
1
awarded  Yearling
Feb
8
awarded  Good Answer
Dec
3
comment Does the weight of an hourglass change when sands are falling inside?
@DarioP Ah yes, that's a really nice way of proving it, thanks.
Dec
3
comment Does the weight of an hourglass change when sands are falling inside?
How can you be sure that the average weight of the stone is exactly the same as the weight of the stone in rest? That doesn't seem at all trivial to calculate.
Nov
13
comment Potential energy in $E_f^2=(mc^2)^2+(pc)^2$?
-1 Everything you said is true, but it doesn't have anything to do with the question of the OP.
Nov
3
awarded  Quorum
Nov
3
reviewed Reviewed What forces are exerted on a clothespin in space?
Oct
24
revised Circumference of a circular path
added 1 characters in body