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Feb
1
revised Is there a doppler effect on the images of stars around rotating black holes?
edited tags
Feb
1
answered Is there a doppler effect on the images of stars around rotating black holes?
Jan
26
comment Will this rope break due to the tidal forces or not?
@AbanobEbrahim Damn, yes, you're absolutely right --- sorry about that!
Jan
26
revised Will this rope break due to the tidal forces or not?
Fixed error
Jan
26
comment Will this rope break due to the tidal forces or not?
No. A to B --- the Earth is acting as the rigid rod, conveying the force to the rope.
Jan
24
comment What happens to wheels of a car moving near speed of light?
@ACuriousMind you cannot perform a Lorentz Transformation between non-inertial frames. The comments of OP's question is not a good place for this discussion --- a good reason why you should post your answers as answers, instead of as comments.
Jan
24
comment What happens to wheels of a car moving near speed of light?
@ACuriousMind ... special relativity only works in inertial systems, which also requires a flat metric. Even in GR one can always find a locally flat metric.
Jan
24
comment What happens to wheels of a car moving near speed of light?
@ACuriousMind I disagree. I dont think this has anything to do with the rigidity of the wheels. The wheels would be limited to going less than the speed of light, thus COM of the car can only approach half the speed of light.
Jan
18
awarded  Nice Answer
Jan
17
comment How gravitational waves are exactly produced?
Can you try to clarify your question. Gravitational waves arises when huge massive bodies do perturb the spacetime itself but here it's the unclear fact: it's the motion of masses itself that perturb the spacetime? What do you mean?
Jan
17
answered What does it mean for a map to be “coadded”?
Jan
7
comment Why is there a longer time lag if light behaves as a wave?
Textbooks are often lacking. Do some additional reading on the internet: e.g. en.wikipedia.org/wiki/Photoelectric_effect, physics.info/photoelectric, physics.bu.edu/~duffy/semester2/c34_photoelectric.html
Jan
7
revised Limitations of 2D point-mass Dynamics of the solar system
Specified title, added relevant tags
Jan
6
comment Particle accelerators reaching light speed
Possible duplicate: physics.stackexchange.com/q/63555/8521, physics.stackexchange.com/q/1557/8521
Jan
6
revised What is the average temperature of mass in the universe?
edited tags
Jan
5
comment Bigger Galaxies = Faster Clocks
The title says 'position', but the question is about 'density'... why the difference?
Jan
5
revised Bigger Galaxies = Faster Clocks
deleted 1 character in body; edited tags
Dec
31
comment What will a glass look like in 500 years?
Duplicate? physics.stackexchange.com/q/65740/8521
Dec
30
reviewed Leave Closed What would happen if the gravitational force was repulsive?
Dec
30
reviewed Leave Closed How can a net force of 0 still lead to movement and how is movement possible with interaction pairs?