Meaningful Conversations

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  • #589259

    this thread is being started bec there has been complaints that theres not to much intellectual talk going on around here and there are actually people who want to have serious conversations! so no shmoozing on this thread! have fun

    #635428

    moish – i started this 4 u

    #635429

    Joseph
    Participant

    Can someone please explain to me, in detail, the theory of relativity?

    Specifically, both special relativity and general relativity.

    #635430

    xoxo
    Member

    The theory of relativity, or simply relativity, generally refers specifically to two theories of Albert Einstein: special relativity and general relativity. However, the word “relativity” is sometimes used in reference to Galilean relativity.

    The term “theory of relativity” was coined by Max Planck in 1908 to emphasize how special relativity (and later, general relativity) uses the principle of relativity.

    Special relativity:

    Special relativity is a theory of the structure of spacetime. It was introduced in Albert Einstein’s 1905 paper “On the Electrodynamics of Moving Bodies”. Special relativity is based on two postulates which are contradictory in classical mechanics:

    The laws of physics are the same for all observers in uniform motion relative to one another (Galileo’s principle of relativity),

    The speed of light in a vacuum is the same for all observers, regardless of their relative motion or of the motion of the source of the light.

    The resultant theory has many surprising consequences. Some of these are:

    Relativity of simultaneity: Two events, simultaneous for some observer, may not be simultaneous for another observer if the observers are in relative motion.

    Time dilation: Moving clocks are measured to tick more slowly than an observer’s “stationary” clock.

    Length contraction: Objects are measured to be shortened in the direction that they are moving with respect to the observer.

    Mass-energy equivalence: E = mc2, energy and mass are equivalent and transmutable.

    The defining feature of special relativity is the replacement of the Galilean transformations of classical mechanics by the Lorentz transformations. (See Maxwell’s equations of electromagnetism and introduction to special relativity).

    General relativity:

    Some of the consequences of general relativity are:

    Time goes more slowly in higher gravitational fields. This is called gravitational time dilation.

    Orbits precess in a way unexpected in Newton’s theory of gravity. (This has been observed in the orbit of Mercury and in binary pulsars).

    Rays of light bend in the presence of a gravitational field.

    Frame-dragging, in which a rotating mass “drags along” the space time around it.

    Technically, general relativity is a metric theory of gravitation whose defining feature is its use of the Einstein field equations. The solutions of the field equations are metric tensors which define the topology of the spacetime and how objects move inertially.

    #635431

    Thank you Wikipedia, otherwise known as………..xoxo

    #635432

    Curious
    Member

    How long did it take to copy and paste?

    #635433

    beacon
    Participant

    Can someone please explain to me, in detail, the theory of relativity?

    Specifically, both special relativity and general relativity.

    🙂

    #635434

    xoxo
    Member

    Thanks 99. That was for you :)~

    #635435

    squeak
    Participant

    Basically, everything is relative. For one thing, the human race shares all the same ancestors. So no matter how careful we are to avoid interfamily marriages, we can’t avoid being related, at least slightly, to everyone in the world.

    That’s in general. Special relatives are a different story. Everyone has them, and everyone knows who they are.

    Hope that answer satisfies. Now, can we talk about meaningful ways to bring about world peace?

    #635436

    teen
    Member

    someone once told me that it is imposible t omove trhu space faster than the speed of light y is this?

    he said something about needing an infinite amount of energy but it didnt really make sense to me

    and btw according to einsteins theory of relativity you cannot move thru time you can only view the past from the distance

    #635437

    squeak
    Participant

    There was a young lady named Bright

    who traveled much faster than light

    She left home one day

    and in a relative way

    returned on the previous night.

    Said the Bright one to her friends in a chatter

    I have learned something new about matter

    As my speed was so great

    much increased was my weight

    Yet I failed to become any fatter.

    #635438

    squeak
    Participant

    … and here’s another one for SJS to appreciate (all of these can inspire meaningful conversation).

    There was a young fellow named Fisk

    Whose fencing was agile and brisk.

    So fast was his action,

    The Fitz-Gerald contraction

    Diminished his sword to a disk.

    #635439

    squeak
    Participant

    And this just goes to show that no one is here for meaningful conversation. If more frum people had dogs then we wouldn’t even be here (:

    #635440

    teen
    Member

    squeak: what are you talking about?????? lol

    #635442

    squeak
    Participant

    I like dogs, but I wouldn’t want to own one. I don’t like the type of maintenance they require. Cats on the other hand, maybe. But I really just meant to say “pet”.

    #635443

    teen
    Member

    where do pets come anywehre into the conversation??? haha you are being very random

    #635444

    Avram in MD
    Participant

    Teen: As an object with mass (like us) accelerates towards the speed of light, the mass increases exponentially (think of mass as a distortion of space-time). Therefore, to keep accelerating, more energy is required (takes more force to accelerate something more massive). As the object approaches the speed of light, mass approaches infinity…

    #635445

    torahtziva
    Member

    mods?

    Can I help you? 😉

    — YW Moderator-25

    #635446

    Basically, everything is relative. For one thing, the human race shares all the same ancestors. So no matter how careful we are to avoid interfamily marriages, we can’t avoid being related, at least slightly, to everyone in the world.

    That’s in general. Special relatives are a different story. Everyone has them, and everyone knows who they are.

    Hope that answer satisfies. Now, can we talk about meaningful ways to bring about world peace?

    –squeak

    Of all your funny posts, I think was one of the funniest. I hereby nominate this for post of the year. Anyone second that?

    #635447

    squeak
    Participant

    Wow. Thanks. In that case, I’m done posting for the year. Because there’s only one direction to go…

    #635448

    yossiea
    Member

    I already replied to you tomorrow. You should have read it last week. (That is if the mods approved the post yesterday.)

    #635449

    000646
    Participant

    Teen you asked

    “someone once told me that it is imposible t omove trhu space faster than the speed of light y is this?”

    I think this is why (this is how i understood it i may be wrong though),

    The mass of any object increases as that object speeds up, the closer you get to the speed of light the mass of the object will keep increasing faster and faster indefinitly and you would keep needing more and more energy to move it along.

    In other words, right before it would hit the speed of light its mass would keep increasing again & again.

    This would keep making it require more & more energy to move it along indefinitly, and you would never be able to give it enough energy to move faster then that, as it keeps needing more and more cuz its mass just keeps getting greater and greater without stopping at a speed close to that of light.

    Since its mass would keep increasing for an infinite amount of times as you get closer to the speed of light you would need more then an infinite amount of energy to move it faster, or even as fast as light & this by definition is impossible.

    So only somthing that has no mass (such as a light “particle”) can move at the speed of light.

    #635451

    yossiea
    Member

    Actually scientists have managed to slow down the speed of light, so there is progress being made.

    #635453

    000646
    Participant

    Yeah but we are talking about going the speed of light as it is now (one hundred eighty six thousand miles per second).

    #635454

    teen
    Member

    000646: thanx that made a lot of sense

    #635455

    000646
    Participant

    U’r welcome!

    #635456

    squeak
    Participant

    186,000 miles per second? I believe that light goes a little faster than that. The difference is probably more than enough to earn you a speeding ticket or two (maybe even enough to outrun the cop, too).

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