All Questions
8
questions
1
vote
4
answers
4k
views
Gravitational force and Electromagnetic force?
I found this interesting note in one of my textbooks,
The enormous strength of the electromagnetic force compared to gravity is evident in our daily life. When we hold a book in our hand, we are ...
- 335
4
votes
1
answer
537
views
Why is there not a General Relativity for forces other than gravity?
I think what I'm looking for here is some sort of a bridge between the very material terms and mental images that I have access to and more of a pure math understanding. My deepest exposure to ...
- 143
18
votes
4
answers
452
views
Why do we talk of the "weakness of gravity" rather than "the surprising charge to mass ratio of particles"?
The relative strength of gravity and electromagnetic forces is obvious — stand on a sheet of paper, and even with the whole of Earth pulling, your motion is stopped by the electric fields inside that ...
- 890
3
votes
0
answers
73
views
How exactly are the relative strengths of gravity and electromagnetism quantified? [duplicate]
I've often heard it said that gravity is much weaker than electromagnetism, and after looking at several questions on SE, I feel that I've got at least a qualitative handle on the concept -- gravity ...
- 171
2
votes
2
answers
349
views
Interaction speed between electric charges and magnetic materials
Einstein said that the speed of a matter in universe cannot exceed the speed of light.
Is it correct for electric force transmission speed from one electric charge to other one?
What is transmission ...
- 521
2
votes
2
answers
7k
views
How can we compare the ratio of strenghts fundamental forces? [duplicate]
I have read in many books that the ratio of strengths of gravitational force, electromagnetic force, nuclear force is 1:10^36:10^38 (one: 10 raised to thirty six: 10 raised to thirty eight). On what ...
1
vote
6
answers
253
views
If gravity were a "real" force, then how would I be able to tell if I'm falling or accelerating in space or on Earth?
Background:
I think it would be helpful for laypersons like myself to understand how, in practice, a "real" force differs from a pseudo-force. Virtually all explanations (eg, on this stack, ...
- 121
1
vote
3
answers
278
views
Does the static gravitational field move with the source instantly?
I have read this question:
How fast does gravity propagate?
where hawkeye says:
So what does that mean? It means that the "speed of gravity" is the speed of light … technically. Changes in ...
- 29k