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Results tagged with gravity
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user 10196
Questions regarding the attractive force which exists between any two bodies of matter.
11
votes
Why does gravity make everything round?
I am studying ways to make an anti-gravity machine (!!). I believe it can be done, or theoretically be done using gravity itself as a "force" that pushes outwards instead of inwards. … If I can answer this question, I am sure I can find a way to "bend" Gravity for my invention.
No anti-gravity to be seen here. …
- 6,401
5
votes
Accepted
Do some galaxies collide faster than the speed of light?
If some galaxies expand away from each other faster than the speed of light then do they collide faster than the speed of light?
The short answer is "no".
The expansion of the distant universe at ap …
- 6,401
16
votes
Why doesn't the Earth's rotation throw us off the surface?
Keep in mind that Earth formed because material was pulled together by it's own gravity. … Maths ahead. :-)
The force of gravity we experience is :
$$F_g = g_e M_o = \frac {GM_eM_o}{R_e^2}$$
Where the "e" subscript is for Earth and the "o" for the person. …
- 6,401
4
votes
Explain to a 4-year old why people below the equator are not tilted or suspended upside down
He has no conception of a space without gravity and cannot make the connection. … For the Earth there is is no other gravity "down", unlike the globe he's being shown. …
- 6,401
4
votes
Theoretical sudden appearance of a black hole in BBC drama show *spoiler warning*
Firstly the show is set in London and everyone seems amazed when the image below rises from the dusk yet clearly it's been in existence for the time taken to create the spiral (hours at least?) so …
- 6,401
5
votes
How can gravitational waves escape from the gravity of black hole?
Gravitational waves are a distortion of space-time outside the black hole. They don't have to escape, because they're already outside.
- 6,401
1
vote
Effect of gravitation
You might want to consult this Wikipedia page on the formation and future of our solar system and galaxy.
Two events to note :
In about 4 billion years our galaxy and the Andromeda galaxy will coll …
- 6,401
3
votes
Can light be curved due to heavy gravitational force?
Light (in general relativity) follows paths in spacetime dictated by the curvature of spacetime. That curvature is a result of gravitational distortion of spacetime by energy (and this includes mass …
- 6,401
3
votes
Accepted
How much time does it take for a meteor (shooting star) to touch the ground after its combus...
I think the best model we could use for this is nuclear test fallout, whose dispersion was monitored quite extensively. It's very, very dependent on weather patterns at altitude.
For example, the Ca …
- 6,401
2
votes
Why the comets can cross the orbits of planets?
Why does the comets are able to cross the planets orbit without touching the planet
Why not they get attracted by the planets when they are in their orbit.
They are attracted to the planets, but unl …
- 6,401
6
votes
Do stars in galaxies also move in elliptical orbits?
Since the gravity of black holes is very high
I feel there's a slight misconception floating around this expression. … So as we start the New Year, can we take a vow to stop portraying harmless black holes as monsters of high gravity ? :-) …
- 6,401
4
votes
Accepted
How does space time differ between galaxies?
Does the gravity wells differ enough between galaxies to have different speeds in space time ?
You are using these terms in a very confused way. …
- 6,401