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    Why does the predicted mass of the quantum vacuum have little effect on the expansion of the universe?

    A fool's fool fools fools who foolishly accept the foolishness of a fool's fool.

    Like 2

    ↩  Folfy_Blue


    I think you are referring to dark energy and the cosmological constant problem. The expansion of the universe seems to be accelerating, and that can be explained by vacuum having non-zero energy density. Quantum field theories have generally non-zero vacuum energy, but the typical value is 10^120 times larger than the observed acceleration. Therefore we need to somehow explain why the universe is not accelerating much faster than it is in reality.


    One answer, which makes sense but is still highly unsatisfactory, is that if the vacuum energy was even just 10 times higher than the observed value, the acceleration would have been enough to prevent the formation of galaxies in the early universe. Without galaxies, there would be no stars, and without stars we would not be here wondering about the value of the vacuum energy.


    This argument does not give a physical reason for the smallness of the vacuum energy, and it even means that there may not be a good reason, because it could be that the small value is a result of some highly unlikely coincidence.


    Question: fucking magnets. How do they work

    ↩  Miwojedk The way a magnet works is related to its atomic structure. Atoms contain electrons, which are constantly spinning and stuff, and magnetism comes from the movement of electrons. However, most objects are not magnetic because the different electrons move in different ways and cancel each other out.
    Ferromagnetism works because some substances (iron, cobalt, nickel, ferrite and more) are different. The electron spins inside their atoms can be arranged in a small range to produce a “magnetization zone”. This is called a magnetic domain. Each magnetic domain in fact has its own north and south poles, making them little magnets of their own.
    After the ferromagnetic substance is magnetized, the internal magnetic domains are neatly arranged and aligned in the same direction, so that the magnetism is strengthened to form a magnet.
    The iron absorption process of the magnet is the process of magnetizing the iron block. The magnetized iron block and the magnet generate attraction between different polarities, and the iron block is firmly “stuck” to the magnet.


    Now, my question. How does a toilet work?

    very soon when your upload speeds finish their work


    how funny would it be if i doom @"Shyrix"#338 as an event????

    i fucking put everything into you and you stomped on it.

    ↩  videogamesm12
    yes he is


    Has you really been far even as decided to use even go want to look more like?

    A triumphant roar echoes from atop the Seat of the Aspects as Nasz'uro, the Unbound Legact is formed.

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