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age 21
visits member for 2 years, 10 months
seen 12 mins ago

May
7
comment Simultaneity and quantum indeterminism
Hi @MoziburUllah, in the terminology anyone is using if they say "relativity of simultaneity", events are defined to be simultaneous if events $(t_1,x_1,y_1,z_1)$ and $(t_2,x_2,y_2,z_2)$ have $t_1=t_2$, which is of course not a lorentz-invariant concept, hence "relativity of simultaneity".
May
6
comment Simultaneity and quantum indeterminism
@JohnDuffield All the articles I get are about the constancy of the speed of light? Yes, if you don't assume the length of a meter (SI convention) is constant, you run into all sorts of problems.
May
6
comment Simultaneity and quantum indeterminism
@Abc2000ro Exactly - because the notion of simultaneity of two spacelike separated events has no inherent physical meaning. The physical meaning comes about when you establish real, physical clocks, and then collect the data at some point.
May
6
answered Simultaneity and quantum indeterminism
May
5
reviewed Approve Has anyone ever tried to formulate physics based on computer science or information processing?
May
5
reviewed Reject Why don't I feel pressure on my body when swimming under water?
May
2
comment Do the same equations of motion imply the same Lagrangians?
I feel like this doesn't really answer the question. It gives a sufficient condition for generating the same equations of motion, but not (as AV23's answer shows) a necessary one.
May
1
awarded  Quorum
Apr
29
reviewed Approve What is the difference between angular speed and tangential speed in a circular motion?
Apr
26
reviewed Approve Why is the conductor an equipotential surface in electrostatics?
Apr
26
reviewed Approve Why do electric field lines start and end at 90 degree at the surface of a conductor?
Apr
26
reviewed Reject Why is a 1mW laser dangerous?
Apr
26
reviewed Reject When will the pringles can fall?
Apr
24
comment How to simulate pendulum movement with high amplitude
khanacademy.org/computer-programming/forphys/6505289796943872 the "degrees" function turns radians into degrees, (multiplication by 180/Pi) which the trig functions need. no further explanation needed
Apr
23
comment Parabolic slide
@Shadock also, since $\dot{x}(x_0)=0$ you'll run into an integral with a singularity at one bound of integration, but it has to be an integrable singularity. If it puts you off too much just take $\dot{x}(x_0)=\varepsilon\to 0$.
Apr
23
answered Parabolic slide
Apr
22
reviewed Reject Does AC current produce EM waves?
Apr
18
reviewed Approve What exactly is the “coherence” between waves?
Apr
18
reviewed Approve Simple question relating to physics prac reports
Apr
17
reviewed Reject How many joules of energy are required to convert 1 liter of water into hydrogen and oxygen, theoretically?