All Questions
11
questions
1
vote
1
answer
104
views
Does dark matter have mass?
When trying to understand what dark matter is, it is helpful to know that some properties of it can already be derived from various observations, such as, it only interacting via gravity and no other ...
- 413
0
votes
2
answers
229
views
How exactly does matter cause spacetime curvature? Is it the result of another force?
In general relativity matter is said to curve spacetime. But I am still not sure how to physically visualize it. Is it an expansion or contraction? Is space being pulled in or is it being pushed out? ...
- 387
7
votes
11
answers
2k
views
If gravity is curvature of space why are more massive objects "heavier?"
How does curved space explain why a denser object of the same shape and volume feels heavier?
- 2,238
1
vote
1
answer
266
views
Can dark matter actually be gravitational radiation?
It seems to exist like only space distortion, and it seems to move just like radiation (specially when galaxy clusters collide, dark matter goes trough unaffected just like some type of radiation).
...
- 291
19
votes
2
answers
2k
views
Does kinetic energy warp spacetime?
My interpretation of GR leads me to think that energy (namely kinetic) also adds to the curvature of space-time. Which, has raised a thought experiment. If a $10000$ kg ship closely passed a $1$ kg ...
- 191
3
votes
3
answers
455
views
What happens to gravity and spacetime when mass turns to energy?
What will happen to the distorted space and time around a mass when it is converted into energy?
Will it go back to its original configuration (i.e. with $0$ gravity)?
Or does space time oscillate? Or ...
- 339
3
votes
2
answers
789
views
Relativistic Mass and Gravity
Does relativistic mass affect space time in the same way as rest mass?
To my understanding, (as I am not an actual physicist, but simply a citizen scientist) relativistic mass is really the measure ...
- 45
1
vote
3
answers
2k
views
Why mass & energy bend spacetime? [duplicate]
I understand how light / matter bend spacetime but I'd like to understand WHY. Is there some kind of interaction?
- 21
-2
votes
3
answers
3k
views
Mass curves spacetime, there is no such thing as gravity?
It is said that there is no such thing as gravity. Mass/energy curves spacetime and a body follows this curvature so gravity is basically the geometry of spacetime. If there is no force of gravity why ...
- 11
0
votes
1
answer
749
views
Why does two masses with energy attract each other?
I have heard that every mass attract another mass with a force directly proportional to the multiplication of their masses and inversely proportional to the square of distance between them, but newton ...
2
votes
1
answer
732
views
Can energy bend space? [duplicate]
I know mass bends the space around it and I also remember matter can be converted into energy and vice versa, so my question is: can energy interact with space in a similar fashion as matter does?
- 13k