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Unsolved Problems in relativity.

Hello Scientists

I am currently working on my final school exam paper about Relativity and Astrophysics and these questions came up. Can anyone give me definite answers to them?

1. Is it possible for an Object (excluding light) to travel at the speed of light? Maybe even faster?

2. If an Object theoretically travels at the speed of light, will its length contract infinitely small or will it converge to a certain number? Does the starting length matter?

3. Do Black holes attract one another?

4. Do black holes die? If yes, after how long? What comes next?

5. Do black holes accumulate mass?

6. Is the Universe infinite? If no, what comes after it?

7. What is the biggest Object in the universe?

8. How far can light travel?

9. Could there be other elements in the universe that we don't know of?

10. Are there radiations other than Light/Sound/Radiowaves..Etc that we can't perceive?

Alexander Campbell

Hochalpines Institut Ftan

Ftan, Switzerland.

poolkill@hotmail.com

 

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Last edited on: 2009-08-06 02:00:24

Categories: Our universe.

Tags: relativity, astrophysics.

 

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6 answer(s)


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lewisgibson says:

What's this? You want us to do your school homework for you? Not on your nelly!

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posted on 2009-08-10 13:28:36 | Report abuse


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lucfield says:

the universe is infiate nothing can go at the speed of light it would become infinate a black hole is millions of lightyears away so it wouldnt attract we dont know what is the biggest thing in the universe because we are still looking because the universe is massive light travels for as long as it wants before it is absorbed there are millions of compounds in the univers there may be new elements electro magnetic radiation is a type.

if there isnt any ting i havent covered sorry i dont know.

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posted on 2009-09-18 16:44:05 | Report abuse


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bowyeraj says:

Read: A brief history of time - Steven Hawking 

The universe may have a beginning and an end, but if this is the case there is nothing before it. (read the book!) 

Black holes can be in a binary system but eventually collapse in on itself and combine... to form what; I'm assuming a black hole with twice the mass.

 

In regards to how far light can travel think of Newtons first law.

 

1. Is it possible for an Object (excluding light) to travel at the speed of light? Maybe even faster?

Nothing can travel faster than the speed of light, though a massless object could theoretically travel at the same speed.

 

"http://en.wikipedia.org/wiki/Twin_paradox" - Time and speed relativity

 

Q9 and 10: simple answer: YES... though with the possibilities of other dimensions it is unlikely that we could find them

In regards to the biggest object in the universe, this i cannot answer.

 

Hope this helps. x

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posted on 2010-04-10 11:31:55 | Report abuse

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sid910 says:

yes and that is gravity. that moves equal to that of light.

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posted on 2010-11-20 08:24:05 | Report abuse


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alexendoo says:

as to question 1, an object can be accelerated to light speed providing it has zero mass, as for behind light speed the only thing we currently know about would be a black hole.-alex, age 13.

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posted on 2010-04-13 20:55:04 | Report abuse


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Calzour says:

1. According to Einstein, as something speeds up its mass increase, therefore the energy required to accelerate it increases, so when an object with any mass reaches light speed, its mass would be infinite, therefore the energy required to accelerate it would be infinite, so no, you couldn't. But there are theoretical particles called tachyons which always travel faster than the speed of light because they speed up as they lose energy, and therefore are always going faster than the speed of light, they are allowed in Einsteinian physics.

2. If it is structurally weak it would break apart, if it was strong enough it would stay togeather but squish a bit more, but an observer would most likely see it go very long even though it wasnt actually.

3. Black holes are too far apart, but if they were then yes, I imagine you would get binary black holes.

4. According to Stephan Hawking Black holes arn't so black, they emit Hawking radiation which would eventually evaporate a black hole, leaving nothing.

5. Yes, they do, the gas they take in adds to their total mass and also shoots out very strong electromagnetic waves like x-rays and gamma rays.

6. No one knows, it could have an infinite like shape...

7. The universe is the biggest object in the universe, but to be more specific, a large galaxy, or for a single object, i'd imagine a red supergiant or nebula

8.Well we have observed light that has been travelling for 13.7 billion years, so light can travel forever.

9. course there could, in 2009 we just named 6 new elements which were descovered recently

10. perhaps dark matter emits something of the sort and we can percieve it, but how would we know it was there if we cant detect it?

 

Age- 16 (so read a book, you might learn something!)

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posted on 2011-12-28 01:31:37 | Report abuse


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