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Thread: Why should not all earth atmosphere sucked by space?

  1. #1 Why should not all earth atmosphere sucked by space? 
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    if space is a empty than it should be vacuum. Means their should be large pressure difference with space and earth atmosphere. so why not this all atmospheric gases sucked by space up to infinity.
    question 2.
    why a permanent magnet does not looses it magnetic filed when some work is done by it ..let me explain
    suppose two permanent magnets are placed on table having friction, when we start to push one magnet toward other, than 2nd magnet get displaced. so that must having some mass and move some distance so word is done by magnet that i have in my hand in pushing other magnet. this can be done by infinite limit.
    tell me from where energy come from.


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  3. #2  
    Brassica oleracea Strange's Avatar
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    Quote Originally Posted by Paramvir Jakhar View Post
    if space is a empty than it should be vacuum. Means their should be large pressure difference with space and earth atmosphere. so why not this all atmospheric gases sucked by space up to infinity.
    Gravity.

    The Earth's gravity holds the atmosphere down. As you go higher up, the atmosphere gets thinner and thinner.

    why a permanent magnet does not looses it magnetic filed when some work is done by it ..let me explain
    suppose two permanent magnets are placed on table having friction, when we start to push one magnet toward other, than 2nd magnet get displaced. so that must having some mass and move some distance so word is done by magnet that i have in my hand in pushing other magnet. this can be done by infinite limit.
    tell me from where energy come from.
    The energy comes from you pushing the first magnet. It is no different than if you were pushing that mass with a solid rod: the rod is only solid because of the the electromagnetic forces between the atoms - just the same as your two magnets.


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    [QUOTE=Strange;509255]
    Quote Originally Posted by Paramvir Jakhar View Post
    if space is a empty than it should be vacuum. Means their should be large pressure difference with space and earth atmosphere. so why not this all atmospheric gases sucked by space up to infinity.
    Gravity.

    The Earth's gravity holds the atmosphere down. As you go higher up, the atmosphere gets thinner and thinner.

    what are the causes of gravity and what is the nature of gravity, it what speed gravity acts?
    is that is the speed of light ?
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    Quote Originally Posted by Paramvir Jakhar View Post
    what are the causes of gravity and what is the nature of gravity, it what speed gravity acts?
    is that is the speed of light ?
    Gravity is caused, mainly, by the presence of mass. It is also caused by the presence of energy. Our current best theory (Gneeral Relativity) explains gravity as the curvature of space-time which we experience as the force of gravity. Gravity, or more accurately changes in gravity, propagate at the speed of light.
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    Gravity is caused, mainly, by the presence of mass. It is also caused by the presence of energy. Our current best theory (Gneeral Relativity) explains gravity as the curvature of space-time which we experience as the force of gravity. Gravity, or more accurately changes in gravity, propagate at the speed of light.[/QUOTE]

    if gravity is act with a speed of light than their should be no effect of gravity on light, then why black hole absorb light. it means gravity is always present around massive object, by the way what massive object have gravitational pull. like we have reason why material have magnetic field.
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  7. #6  
    Cooking Something Good MacGyver1968's Avatar
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    Doesn't the Earth's electromagnetic field also help us keep our atmosphere by blocking the solar wind?
    Fixin' shit that ain't broke.
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  8. #7  
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    Quote Originally Posted by Paramvir Jakhar View Post
    if gravity is act with a speed of light than their should be no effect of gravity on light
    I don't see the connection between the speed at which gravity propagates and whether or not it affects light.

    Even Newtonian gravity, which acts instantly, has an effect on light (the wrong amount; one of the many problems with Newton's theory).

    Also, it is only changes in gravity that propagate at the speed of light.

    We know that gravity affects light: Gravitational lens - Wikipedia, the free encyclopedia

    then why black hole absorb light.
    Remember that gravity is the curvature of space-time: at the event horizon of a black hole, the curvature is so extreme that there is no longer any path out of the black hole. All paths are so curved they head back towards the center of the black hole.

    it means gravity is always present around massive object, by the way what massive object have gravitational pull.
    Correct.
    Without wishing to overstate my case, everything in the observable universe definitely has its origins in Northamptonshire -- Alan Moore
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    Quote Originally Posted by MacGyver1968 View Post
    Doesn't the Earth's electromagnetic field also help us keep our atmosphere by blocking the solar wind?
    True. Changes in temperature also change how much gas is lost from the outer atmosphere (because the warmer the atmosphere is, the more it expands and so the outer layers are held less strongly by gravity).
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    why massive objects acts gravity
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    Quote Originally Posted by Strange View Post
    Remember that gravity is the curvature of space-time: at the event horizon of a black hole, the curvature is so extreme that there is no longer any path out of the black hole. All paths are so curved they head back towards the center of the black hole.
    Why can hawking radiation escape ? And what about gamma ray bursts?
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    Quote Originally Posted by ChaosD.Ace View Post
    Why can hawking radiation escape ?
    Hawking radiation comes from (just outside) the event horizon.

    Other sources of radiation from black holes are things like the accretion disk or polar jets which are, again, outside the event horizon.
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  13. #12  
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    Quote Originally Posted by Paramvir Jakhar View Post
    why massive objects acts gravity
    I don't know if there is an answer to that. why do electrons have charge? As far as we know, they just do.

    A future theory might explain why mass curves space-time and why electrons have charge. But then there will just be new unanswerable "why" questions.
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    Space doesn't suck!
    It's really cool.
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  15. #14  
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    Quote Originally Posted by Strange View Post
    Quote Originally Posted by MacGyver1968 View Post
    Doesn't the Earth's electromagnetic field also help us keep our atmosphere by blocking the solar wind?
    True. Changes in temperature also change how much gas is lost from the outer atmosphere (because the warmer the atmosphere is, the more it expands and so the outer layers are held less strongly by gravity).
    Well that's true but not by much. A far greater effect is the higher energy and speed of individual atoms and molecules.
    --
    Relativistic effects are negligible in an atmosphere, many orders of magnitude below other considerations.
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    It's so wonderful, how we use charge all the time our calculations at A level, and probably in Uni too, yet we don't know what it's made from, how it originates, why changing magnetic fields create electric fields. It's so beautiful, maybe I should research it for my PhD in the future. All the insane questions, all of our attempts to go deeper.

    Ducky, my knight, Space will stop suckin when we can travel to Andromeda in a reasonable amount of time, I just wanna find a world with advanced life-forms (even better, silicon based life ( that would be soooooooooooooper cool)) I am sorry if I annoyed you at any point, I am just an aspiring naive engineer lookin to make crazy tech.

    Yall have a wonderful new year
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    Quote Originally Posted by ChaosD.Ace View Post
    It's so wonderful, how we use charge all the time our calculations at A level, and probably in Uni too, yet we don't know what it's made from, how it originates, why changing magnetic fields create electric fields.
    True, but realize that there's never an end to such questions. Every answer can be met with another round of questions. If I were to say that charge was made of subflexive superradiant nanoschmorks, one could always ask what those are made of, how they originate, how they give rise to charge, etc.

    Yall have a wonderful new year
    And you, too!
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    Quote Originally Posted by tk421 View Post
    If I were to say that charge was made of subflexive superradiant nanoschmorks, one could always ask what those are made of, how they originate, how they give rise to charge, etc.
    Whut?
    My first question would be "Do they go better with red or white wine?"
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  19. #18  
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    Quote Originally Posted by tk421 View Post
    Quote Originally Posted by ChaosD.Ace View Post
    It's so wonderful, how we use charge all the time our calculations at A level, and probably in Uni too, yet we don't know what it's made from, how it originates, why changing magnetic fields create electric fields.
    True, but realize that there's never an end to such questions. Every answer can be met with another round of questions. If I were to say that charge was made of subflexive superradiant nanoschmorks, one could always ask what those are made of, how they originate, how they give rise to charge, etc.
    And that is the beauty of it. I am a big gamer and a concept like this is the equivalent of picking up a game (of my favorite genre) that never ends, a game I can always play and be adicted to.

    My favorite answer to the question "what is the difference between virtual reality and real reality?" is "its the quality of data". That is what I seek to do, to use the programming language of the universe, heck maybe even the multiverse to programme things that one could easily manifest in a game (but not so easily in the real world due to the increase in complexity of the programming language). I do however understand that some concepts simply violate the workings of this particular universe.

    They may be big dreams but I don't really want to live for something small.
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  20. #19  
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    gravity power
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    Quote Originally Posted by Dywyddyr View Post
    Space doesn't suck!
    It's really cool.
    Really cool? Really really cool. It's only about -270oC on average.
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  22. #21  
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    Quote Originally Posted by tk421 View Post
    True, but realize that there's never an end to such questions. Every answer can be met with another round of questions. If I were to say that charge was made of subflexive superradiant nanoschmorks, one could always ask what those are made of, how they originate, how they give rise to charge, etc.
    Yes, an explanation of physical phenomena in terms of other physical phenomena isn't really an explanation at all, and ultimately leads to a circularity or infinite regression. To avoid this, one needs an explanation in terms of logical (mathematical) notions.

    I think it is correct to say that gravity does not have a cause, but is a manifestation. Energy-momentum and gravitation (in short, spacetime curvature) is a manifestation of the symmetry of spacetime to coordinate transformations. If we consider all the ways spacetime can be described, and equate those descriptions that are coordinate transformations of one another, then the distinct spacetimes are distinguished by their spacetime curvature. However, it is a "luck of the draw" which particular distinct spacetime is the one in which we exist.

    The total spacetime curvature can be decomposed into distinct types of curvature. One type of spacetime curvature manifests itself as energy-momentum, while another type manifests itself as the gravitation external to the energy-momentum. But there is a relationship between these types of spacetime curvature that provides the relationship between energy-momentum and the associated gravitation.
    There are no paradoxes in relativity, just people's misunderstandings of it.
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  23. #22  
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    Gravity. Wait...did someone allready say that?
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  24. #23  
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    Quote Originally Posted by KJW View Post
    Yes, an explanation of physical phenomena in terms of other physical phenomena isn't really an explanation at all, and ultimately leads to a circularity or infinite regression. To avoid this, one needs an explanation in terms of logical (mathematical) notions.
    Pure mathematics is not immune to that sort of problem either. Consider the set of all sets that are not members of themselves. Very arbitrary (to my eyes) things have to be done to avoid that problem.
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    I have read that hydrogen and helium escape into space and that Earth has lost huge amounts of these elements this way. Why?
    Grief is the price we pay for love. (CM Parkes) Our postillion has been struck by lightning. (Unknown) War is always the choice of the chosen who will not have to fight. (Bono) The years tell much what the days never knew. (RW Emerson) Reality is not always probable, or likely. (JL Borges)
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    Quote Originally Posted by jrmonroe View Post
    I have read that hydrogen and helium escape into space and that Earth has lost huge amounts of these elements this way. Why?
    Because they are very light. At high temperatures (sometimes seen near the top of the atmosphere) the thermal speed of light gases is sometimes enough to escape the Earth's gravitational pull completely.
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  27. #26  
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    Could it be said that the vacuum of space aids in the loss of these gases because a vacuum means lack of matter/molecules, and so, it has nothing/less to interfere with the escaping molecules? I've heard that deep space has a density of about one molecule per cubic meter, and that sounds like a lot of nothing that could interfere with escaping molecules.
    Grief is the price we pay for love. (CM Parkes) Our postillion has been struck by lightning. (Unknown) War is always the choice of the chosen who will not have to fight. (Bono) The years tell much what the days never knew. (RW Emerson) Reality is not always probable, or likely. (JL Borges)
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  28. #27  
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    Quote Originally Posted by jrmonroe View Post
    Could it be said that the vacuum of space aids in the loss of these gases because a vacuum means lack of matter/molecules, and so, it has nothing/less to interfere with the escaping molecules? I've heard that deep space has a density of about one molecule per cubic meter, and that sounds like a lot of nothing that could interfere with escaping molecules.
    Good question. I've also heard that with ice placed in a vacuum (e.g. space) the surface will boil and sublimate but that, the water vapour doesn't go flying off so most of it recondenses on the parent ice. Is that what's really happening? Is there an elegant explanation for this weirity?

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  29. #28  
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    Quote Originally Posted by jrmonroe View Post
    I have read that hydrogen and helium escape into space and that Earth has lost huge amounts of these elements this way. Why?
    I looked it up a long time ago & earth is gaining more mass (mostly from dust to pea sized meteorites) about 50,000 tons per year.

    I do not remember how much we loose from hydrogen&helium & unable to find it. However I do remember it was less than net gain.

    so, unfortunately. You will weigh more tomorrow instead of less (assuming you are a spherical human in a vacuum) XD
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