All Questions
23
questions
1
vote
1
answer
136
views
Do the other 3 fundamental forces also warp space-time?
I got this idea from Einstein's insight using the falling elevator. He says, that Gravity really cannot be distinguished from any other force accelerating the elevator.
A bunch of questions on here (...
- 113
1
vote
1
answer
103
views
A wind tunnel and 2 strong magnets in the wind tunnel creating a very strong field, how would the wind & magnetic force interact?
Sorry if I get some terminologies wrong I am not a physics major :)
If I had a big wind tunnel on earth blowing wind through a strong magnetic field (so the opposite poles of 2 giant magnets creating ...
- 13
1
vote
1
answer
139
views
If contact forces are repulsive then how are we able to pull stuff? [closed]
I searched a lot on internet(especially physics stackexchange) about the nature of contact forces. I came to know through most of them that it is repulsive in nature which surely means that your hand ...
- 81
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
857
views
How do gravitons and photons interact?
First of all, I am a noob in physics (I‘m a computer scientist) and started reading Hawking‘s „A brief history of time“. In Chapter 6 he says that “electromagnetic force [...] interacts with ...
- 13
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
2
votes
1
answer
228
views
How can one fundamental force be stronger than another?
This doesn't seem to make any sense. Gravity depends on mass or spacetime curvature but the electromagnetic force depends on electric charge. For any particular particle we could say that the force of ...
- 21
-1
votes
2
answers
266
views
Why is gravity so special?
I am not a physicist but still I love the subject very much. A thought recently popped up in my mind while studying and I'm still confused about it.
"If a person falls freely he will not feel ...
- 758
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
0
votes
1
answer
191
views
How is the electromagnetic/gravitational force transmitted? [duplicate]
So I was thinking about how a positive and a negative charge (or positive/positive, negative/negative) interact. I have read previously about how photons carry the electromagnetic force. However, how ...
- 257
1
vote
1
answer
1k
views
Electric force much stronger than gravitational force? [duplicate]
It is commonly said that the electric force is much stronger than the gravitational force. Indeed, Coulomb's constant $k_e$ is much larger than the gravitational constant $G$ but they are measured in ...
- 2,075
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 ...
3
votes
2
answers
6k
views
What could happen if each of the four fundamental forces became stronger or weaker? [closed]
Theoretically, what could happen if:
Strong interaction
Weak interaction
Gravitation
Electromagnetism
Became stronger or weaker?
What would be the observable effects for each, separately?
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
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
-2
votes
1
answer
116
views
Weight of magnetic objects and polarization [closed]
I am an Iranian engineer and have a question which no one has answered me yet.
In weighing a strong magnet, there is a difference between the weights from different polarization directions, why is ...
3
votes
1
answer
816
views
Could the 4 Forces Split Off or "Decay" into Other Forces in the Distant Future? [duplicate]
From my basic understanding of popular-level physics articles and books and such, the 4 forces (Electromagnetism, Gravity, Strong and Weak Force) used to be 1 force in the early universe, then split ...
1
vote
0
answers
247
views
Why is gravity so weak? [duplicate]
How does physics explain the enormous disparity between the gravitational scale and the typical mass scale of the elementary particles? In other words, why is gravity so much weaker than the other ...
0
votes
0
answers
70
views
why do everything tend to be stable? [duplicate]
Whenever I ask'why does a proton attract electron?'
People say that 'because they are oppositely charged'
But I want to know why do opposite Charges attract each other and tend to become neutralised?
...
- 1,293
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
3
votes
2
answers
276
views
Classical electrodynamics formulated in terms of forces
The Newton's law of universal gravitation is described in terms of a force, which is produced by an action at a distance. It also can be described using the concept of a field, and that would be an ...
- 51
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
3
votes
4
answers
549
views
existence of other forces obeying inv square law
Is there any restriction in what we know of physics to the existence of other type of forces that obey the inverse square law in 3 dimensions.
I mean other than electromagnetic and gravitational.
...
- 627