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Gravity

We all know there is no such thing as zero gravity even at the very end of universe there is micro gravity according to formula for gravity…!
Means we are away from certain object so the gravity exist in vacuum so now my question is:-
Q- We all know that there is zero Gravity in center of earth core so if we place an object in center of earth the would Gravity formula apply on that object or that object is in complete Zero gravity…????

 

Asked Pratik Bhoir

 

 

 

Answer:

 

If we simply keep a body at the centre, it will remain there as it is attracted equally in all directions.

 

A man in an elevator free falls through a plan...
A man in an elevator free falls through a planet to simulate how a gravity train could work. At both ends of the planet the train comes to a complete stop, but free falls through the middle (or wherever the tunnel is constructed) of the planet. (Photo credit: Wikipedia)

 

GRAVITY

 

Speed of Light

How can the speed of light be a constant, when time is not?
If the rate of time can change depending of speed of matter or extreme gravity, the speed of light is 186,000 miles per second, but a second could flow at different rates.
If light from a star passes close to a black hole where time flows slower, this changes the speed of light we perceive?

Asked Martin

 

Are all theories of Physics based on a mathematics … ?

Are not all theories of physics (general relativity, quantum mechanics and other variations) based on a mathematics of structure? An assumption that the model and its constituents have structure? Structure that assumes space as a necessary, though maybe not formalized component?

English: Quantum black hole Русский: Квантовая...

Could it be that during a black hole collapse that ALL structure is lost? All space is eliminated.  There is no space, only mass/energy?

Posted by Richard

IF A TRAIN TRAVELS WITH SPEED OF LIGHT; WHAT HAPPENS TO ITS LENGTH??

IF A TRAIN  TRAVELS WITH SPEED OF LIGHT; WHAT HAPPENS TO ITS LENGTH?

Asked MARIAN

Answer

askphysicslogoAccording to the theory of relativity, the length will decrease to zero.

Please refer to ther following links for more information on the question.

  1. http://en.wikipedia.org/wiki/Length_contraction
  2. http://io9.com/5527521/what-happens-if-youre-traveling-at-the-speed-of-light-and-turn-on-your-headlights
  3. http://wiki.answers.com/Q/What_happens_when_you_travel_at_the_speed_of_light
  4. http://www.physics.org/interact/time-twins/special-relativity.html
  5. http://www.physlink.com/education/askexperts/ae169.cfm
Time dilation in transversal motion. The requi...
Time dilation in transversal motion. The requirement that the speed of light is constant in every inertial reference frame leads to the theory of relativity (Photo credit: Wikipedia)

How is quantum simultaneity compatible with relativity?

When an entangled particle “collapses”, physics says that the other particle collapses simultaneously.

But that’s non compatible with relativity, which says that simultaneity depends on the place and velocity of the observer.

 

Events A, B, and C occur in different order de...
Events A, B, and C occur in different order depending on the motion of the observer. The white line represents a plane of simultaneity being moved from the past to the future. (Photo credit: Wikipedia)

 

So the question is:
– How can quantum disentanglement simultaneity be compatible with relativity? Do the entanglement state is dependent on the observer, in the mean that a pair of particles can be entangled for one observer and collapsed to other?
– What experiments fundament the answer? Is the answer only theoretical?

 

Asked Marraco

 

Awaiting response from visitors

 

 

physics, particle relationships

English: Shows slices of expansion of universe...
Shows slices of expansion of universe without an initial singularity (Photo credit: Wikipedia)

 

Was every event created at the moment of the big bang by the position of every particle at that moment? Every action is based on the action of the moment before and must obey the laws and forces of physics therefor suggesting every element, compound, and even human thought were predetermined by the exact position of particles/energy at the begining of time.

 

Asked  Paul Godwin (freshman Sac City College)

 

Is the universe expanding or are we getting smaller?

English: Shows slices of expansion of universe...

English: Universe as per Jainism
English: Universe as per Jainism (Photo credit: Wikipedia)

Is the universe expanding or are we getting smaller?

Asked Dany Burton

English: raisin bread model of the universe

The Question is left for the readers to answer

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