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1h
revised Do any approaches to a TOE expect to provide a unique solution to the universe?
edited tags
2h
comment Questions about null geodesic
Related: physics.stackexchange.com/q/107921/2451
2h
reviewed Leave Closed How can there be an infinite number of universes?
2h
revised Spread of gases in a room
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2h
comment Is there a 3D analogue of angle?
Would Mathematics be a better home for this question?
2h
revised A 50 g Ice Cube with an initial temperature of -10°C is put in 400 g of water at 40°C. Find final temperature
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2h
comment Two-point function of a free massless scalar field in Euclidean space-time
Crossposted to mathoverflow.net/q/237647/13917
3h
revised Expectation value using Functional Derivatives
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4h
comment Can we embed 2+1 space-time of GR in a 3 Dimensional Euclidean space?
To reopen this question (v1) consider 1. clarifying your definition of Euclidean space, and 2. harmonize title question and question in main body (3D vs. 4D).
4h
revised Deriving the speed of the propagation of a change in the Electromagnetic Field from Maxwell's Equations
added 8 characters in body; edited tags
4h
revised Antiparticles, charge conjugation and chirality
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4h
revised Lagrangian for relativistic massless point particle
Changed from SR to GR to be more general
4h
revised Lagrangian for relativistic massless point particle
Changed from SR to GR to be more general
5h
comment How can I prove that the Euler-Bernoulli beam PDE is Hamiltonian?
@AccidentalFourierTransform: Ups. Thx. Corrected.
5h
comment How can I prove that the Euler-Bernoulli beam PDE is Hamiltonian?
Hint: The corresponding Lagrangian density is ${\cal L}=\frac{1}{2}u^2_t - \frac{1}{2} u_{xx}^2 - F(x,u)$.
5h
revised How can I prove that the Euler-Bernoulli beam PDE is Hamiltonian?
added 148 characters in body; edited tags; edited title
5h
revised Rotation of a vector
added 2 characters in body; edited tags
6h
revised How does change in medium affect object distance/image distance?
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6h
revised Net force equal to mass multiplied by acceleration of centre of mass
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6h
revised EM: Maxwell relations, waves
deleted 24 characters in body; edited tags