Recent content by Souhardya Nandi

Yes, I guess what I mean is rolling resistance And I am assuming we calculate only the resistance from compression or deformation of surface.

You misunderstood my question, sir. I am not asking what rolling friction is. I am asking if there is an existing formula to find the rolling friction coefficient of a body from its material properties without any form of experimentation. Do reply if you can.

I was wondering that if rolling resistance is basically caused by slight deformation of a body, we must have formulas in place to relate it to the physical and material properties of a body. But when I went ravaging for it in library or internet, everything was experimental. I wished to know...

I am reading about Kerr black holes and non rotating black holes. But I am unable to understand what decides whether the black hole will not rotate or rotate. And if No Hair theorem suggests, we can know about a black hole through its angular momentum, what implications does zero angular...

Can you please provide link to a useful PF Insights article ?

I am reading a bit about them. However, I feel that there is not much difference between them except for the life span. Can you please help me understand the distinction ? Can this be explained on basis of string theory ? Please elaborate.

I understand your point. So, do you mean expansion is not playing any role in this observation ?

I know we have such evidences. However, I wanted to know if this phenomenon can be considered a proof.

In the universe, there are several celestial bodies, all of which attract each other. Then why is it so that they do not collapse towards each other. Is it a consequence of expansion. If so, will a change in acceleration of expansion have any effect on it.And can then this be considered a...

I have not really got much of an idea. Most of the articles have too much usage of technical words. I need to know almost every theory on particle physics to get to understand it. So I thought maybe someone over here can cut out the too much adavanced terminology. Also, I can't understand what...

Can anyone shed a bit of light on what a Higgs Boson is, how it was discovered and what its discovery implies for physics ?

As a beginner here, I don't really know how to access the signature of someone. Can you please guide me ?

This has been a real famous analogy and I understand it, except the fact that the balloon surface is a 2D structure. How is it possible to depict a 3D universe on a 2D plane ? What happens when we work with stars at multiple planes ?

Sorry again. Oh yes. I understood mfb answer. Did not spot it at first. Thats why. Never mind. Ignore this subsequent question.

Sorry. Actually I misplaced my question. Let me reframe my question. He gave 2 possible causes of this energy. I wanted to know which is consistent with the latest observations and models ?