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Re: science question

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Boeing717 is not online. Boeing717
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Joined: 08 Jun 2008
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12 Jun 2012 07:05 PM
okay so i dont understand general relativity

i understood the math behind special relativity fine so can someone help me with understanding general relativity please
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sdfgw is not online. sdfgw
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12 Jun 2012 07:06 PM
yeah sure it's easy you just generalise

y'know like put more letters in
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DigtzyDog is not online. DigtzyDog
Joined: 12 Jul 2011
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12 Jun 2012 07:06 PM
NO
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Boeing717 is not online. Boeing717
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12 Jun 2012 07:07 PM
sdfgw

i think i might be putting in the wrong letters because it makes no sense
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victor142 is not online. victor142
Joined: 31 Jan 2009
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12 Jun 2012 07:07 PM
Space and time is relative.
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TheShooper is not online. TheShooper
Joined: 12 Nov 2011
Total Posts: 839
12 Jun 2012 07:08 PM
Why? You growing up to be einstein?
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Boeing717 is not online. Boeing717
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12 Jun 2012 07:08 PM
shooper

no
because i want to understand the modern view of our universe
unfortunately i cant find anything good on quantum physics
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sdfgw is not online. sdfgw
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12 Jun 2012 07:10 PM
@boeing:

nah man it's easy

you know like

um tryin to think of examples

ok um

you ever notice how like you take a square like

8^2 = 64

if you multiply the adjacent numbers you get like

7 * 9 = 63

and this works for frickineverythin and you're like woah how

then you generalise it

(x+1)(x-1) = x^2 - 1

and then you get like nobel prizes and stuff

basically you take special relativity and make it work on more stuff and that makes it better
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sdfgw is not online. sdfgw
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12 Jun 2012 07:11 PM
"Space and time is relative."

it's startling how I can deliberately try to be stupid and still wind up smarter than a sincere reply
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Boeing717 is not online. Boeing717
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12 Jun 2012 07:12 PM
but the math is more confusing for general relativity


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Boeing717 is not online. Boeing717
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12 Jun 2012 07:13 PM
the one problem i have with special relativity is in his derivation of the lorentz equations einstein seems to be pulling random variables out of nowhere and im not using anything more than the book and my head so i cant play around with the equations
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snow9450 is not online. snow9450
Joined: 23 Apr 2009
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12 Jun 2012 07:14 PM
The answers seven obviously.
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sdfgw is not online. sdfgw
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12 Jun 2012 07:14 PM
no it isn't it's fun

generalisation = making better = making more enjoyable = +fun = +ease = easier

give me basically any relativity equation and i'll generalise it

also don't give me that obvious one because I actually do know how to generalise that, irony aside
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TheJokeIsInTheSetup is not online. TheJokeIsInTheSetup
Joined: 24 May 2012
Total Posts: 539
12 Jun 2012 07:15 PM
"nah man it's easy

you know like

um tryin to think of examples

ok um

you ever notice how like you take a square like

8^2 = 64

if you multiply the adjacent numbers you get like

7 * 9 = 63

and this works for frickineverythin and you're like woah how

then you generalise it

(x+1)(x-1) = x^2 - 1

and then you get like nobel prizes and stuff

basically you take special relativity and make it work on more stuff and that makes it better"

Holy crap my mind
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Boeing717 is not online. Boeing717
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12 Jun 2012 07:15 PM
what if i give you a set of transformations
can you generalize those

also i thought the obvious one was the generalized one
but if its not please generalize it
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awsomeness7878 is not online. awsomeness7878
Joined: 23 Nov 2008
Total Posts: 9512
12 Jun 2012 07:15 PM
General relativity is the statement that time is distorted by gravity. If you have ever seen that whole thing about the giant grid representing space-time, and an object with gravity kindof distorting it, it will probobly be easy to understand what i am saying.
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sdfgw is not online. sdfgw
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12 Jun 2012 07:16 PM
@TJIITS:

now i'm curious

what actually blew your mind there, the revelation of a general mathematical trick or an allergy to basic algebra
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Boeing717 is not online. Boeing717
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12 Jun 2012 07:16 PM
joke

if you take the number x+2 and x-2 then you get x^2-4
example
8
64
6*10
60
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Boeing717 is not online. Boeing717
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12 Jun 2012 07:17 PM
awsome

i know what it is
i want to understand the math behind it though
its all well and good to know something
its better to understand why its right
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awsomeness7878 is not online. awsomeness7878
Joined: 23 Nov 2008
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12 Jun 2012 07:19 PM
Well, the gravity's effect on space decreases with a nice half life relationship, and so I assume that the same is true for gravity's effect on time.
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Boeing717 is not online. Boeing717
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12 Jun 2012 07:19 PM
"the revelation of a general mathematical trick or an allergy to basic algebra"

it blew my mind too until i remembered "wait i did this recently"
when you use words it looks more confusing than to use math(s) notation or whatever the proper terminology is
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Boeing717 is not online. Boeing717
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Joined: 08 Jun 2008
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12 Jun 2012 07:20 PM
"gravity's effect on space decreases with a nice half life relationship"

That was law of universal gravitation. General relativity has a higher degree of accuracy than that, and has superseded it.
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TheJokeIsInTheSetup is not online. TheJokeIsInTheSetup
Joined: 24 May 2012
Total Posts: 539
12 Jun 2012 07:23 PM
"now i'm curious

what actually blew your mind there, the revelation of a general mathematical trick or an allergy to basic algebra"

A bit of both
Mixed in with tiredness
wow
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sdfgw is not online. sdfgw
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12 Jun 2012 07:26 PM
"if you take the number x+2 and x-2 then you get x^2-4
example"

i'm killing this now

(x-a) = x^2 - a^2

generalisation saves the day from an onset of pointless crap once again

"what if i give you a set of transformations
can you generalize those

also i thought the obvious one was the generalized one
but if its not please generalize it"

e=mc^2

energy is mass times speedolight squared

we all know this

this is actually a specific form of another equation

energy can be given as a vector, with one component as masstimesspeedolightsquared and one component is momentumtimesspeedoflight

note that momentum is mass*speed, therefore it only needs multiplying by c once to achieve the same units as mc^2

so anyway this is a vector and from pythag the energy can be given as

e^2 = (mc^2)^2 + (pc)^2
e = root((mc^2)^2 + (pc)^2)

where e is energy, m is mass, p is momentum and c is speed of light

in the cases of anti-matter and matter annihilation (pretty much the only cases where this is relevant) there is no momentum because the velocity is zero (the particles hit each other head on, cancelling out momentum). therefore p = 0 and it is reduced to

e = root((mc^2)^2)
e = mc^2

whoopdefrickingdo

interesting in the case of photons, it is the mass that is 0 and not the momentum, yielding

e = pc

but yeah that's just side notes
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awsomeness7878 is not online. awsomeness7878
Joined: 23 Nov 2008
Total Posts: 9512
12 Jun 2012 07:26 PM
I find that with a lot of theoretical physics, there isn't usually much math behind it, it is more like a theory as to how the universe works. If you look it up, I'm sure you will find some sort of equation, but it may be more vague than you are looking for.
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