1

Physics, Astronomy & Cosmology / Re: How does Hawking's radiation helps in figuring out "the theory of everything"?

« on: 07/05/2016 03:10:20 »

How can the understanding about empty space possibly help us to find the "theory of everything"?

2

Physics, Astronomy & Cosmology / How does Hawking's radiation helps in figuring out "the theory of everything"?

« on: 06/05/2016 17:57:32 »

I just watched a video where it is said that Hawking's radiation theory is a link between quantum mechanics and general relativity and that it can explain the theory of everything if it is developed further.Can someone be kind enough to tell me how that can happen?
Does Hawking's really hold the key to the lock of all unexplained theories of the universe?
 []

3

Physics, Astronomy & Cosmology / Re: What is the weight felt by a person in freely falling lift ?

« on: 22/04/2016 12:19:07 »

Let's say that random air currents place the scales 1cm above the lift floor, and your feet 1cm above the scales as you fall. There is no pressure of your feet on the scales, and no pressure of the floor on the scales, so the scales will read zero*.

I do not understand how you relate pressure to zero weight in the above statements.Can you please elaborate more on that ?

4

Physics, Astronomy & Cosmology / What is the weight felt by a person in freely falling lift ?

« on: 22/04/2016 09:42:42 »

It's zero []  But I don't know how scientifically.Can someone explain this to me?

5

Physics, Astronomy & Cosmology / Re: How do balanced forces cause motion according to Newton's laws?

« on: 22/04/2016 06:15:36 »

What if the applied forces by each team in the tug of war game was equal ? In that case,none of the team wins or collapses,right ? What I can't understand is if the forces are equally exerted on an object,then they are still said to be in motion as said by Newton.That can't be true in tug of war game,can it ?

6

Physics, Astronomy & Cosmology / How do balanced forces cause motion according to Newton's laws?

« on: 21/04/2016 17:20:59 »

If you imagine a situation of tug of war played by two teams exerting equal forces,in that case,no team experiences a motion,that is no single team gets pushed out of the border line (I assume you know the tug of war game)
If that is the case here,then how does Newton actually say that balanced forces cause motion ? I mean doesn't that sound instinctually wrong ?

7

Physics, Astronomy & Cosmology / How does earth exert same acceleration on all kinds of objects ?

« on: 20/04/2016 12:10:10 »

I would be very grateful if someone answers to the point in a way that it makes sense for a high school student.   []

8

Physics, Astronomy & Cosmology / How is electromagnetic force a long range force ?

« on: 20/04/2016 05:02:53 »

Electromagnetic force operates between charged particles such as proton and electron,If that is the case how can it be classified as long range force that is it can operate over a long distance ? Isn't charged particles at the atomic level(small distance between proton and electron)  which should make electromagnetic force a short range force ?