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slow time and gravity

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IamSmooth

Sun Feb 13 2011, 08:43PM

Registered Member #190 Joined: Fri Feb 17 2006, 12:00AM
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Posts: 1567

I had read in the past that gravity slows time. Recently, I read that it is the slower time that causes gravity. If this is the case, what is causing time to be slower in the first place so that it can cause gravity. Or, is this not really fully understood? Anyone really good with relativity, here?

ZakWolf

Sun Feb 13 2011, 10:58PM

Registered Member #3114 Joined: Sat Aug 14 2010, 08:33AM
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Posts: 608

gravity is a subatomic particle called a graviton, check it out

IamSmooth

Mon Feb 14 2011, 01:30AM

Registered Member #190 Joined: Fri Feb 17 2006, 12:00AM
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LittleVenture wrote ...

gravity is a subatomic particle called a graviton, check it out

And where was this actually proven? What experiment verified the existance of the particle because I thought it has not been found, yet.

Patrick

Mon Feb 14 2011, 05:19AM

Registered Member #2431 Joined: Tue Oct 13 2009, 09:47PM
Location: Chico, CA. USA
Posts: 5639

if the graviton has been decisively proven ill eat my hat.

Coronafix

Mon Feb 14 2011, 05:59AM

Registered Member #160 Joined: Mon Feb 13 2006, 02:07AM
Location: Melbourne, Australia
Posts: 938

I'll eat my shorts.

william L

Mon Feb 14 2011, 08:14AM

Registered Member #3093 Joined: Mon Aug 09 2010, 11:40PM
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I'll eat my sister

Conundrum

Mon Feb 14 2011, 09:37AM

Registered Member #96 Joined: Thu Feb 09 2006, 05:37PM
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Posts: 4061

ew.. topic drift.

AFAIK, gravitons could appear at high energy levels such as very near a BH event horizon.

One reason why gravitons are theorised to be merely a kink in the equations and not an actual particle, is that if they exist then they gravitate to each other due to the nonlinearity of Einstein's field equations. Therefore their number is infinite and as we know this makes no sense. Google "renormalization"

-A
#include "physics, it works beeaches.h"

ZakWolf

Mon Feb 14 2011, 10:07AM

Registered Member #3114 Joined: Sat Aug 14 2010, 08:33AM
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Sorry it is not proven YET, they are trying to catch one on a filter at the Large Hadron Collider. Except that the particles that are given off by smashing protons together seem to escape to nowhere (another dimension) leaving little trails in the filter.

Steve Conner

Mon Feb 14 2011, 10:26AM

Registered Member #30 Joined: Fri Feb 03 2006, 10:52AM
Location: Glasgow, Scotland
Posts: 6706

Not to be confused with a "gravy ton", which is like a crapload, only runnier.

Einstein's way of putting it was that gravity was a distortion of space-time. An object with mass (mass-energy, even) bends the fabric of space like a bowling ball on a trampoline. The distortion is a potential well that attracts other massive objects, just like another bowling ball put on the trampoline would run towards the first one. Near a massive object, space actually goes "downhill" in a 4-dimensional sense. Hence, gravitational force.

Because mass and energy are the same, an object's mass depends on its velocity, which in turn can depend on gravitational attraction. And the mass is what causes gravitational attraction. So the equations of general relativity are non-linear and extremely hard to solve for all practical situations.

Nobody really knows the fundamental "reason" for inertial mass. But I've heard there are certain magical substances that distort the fabric of space-time so badly that it's impossible to get off the couch.

Xray

Tue Feb 15 2011, 03:19AM

Registered Member #3429 Joined: Sun Nov 21 2010, 02:04AM
Location: Minnesota, USA
Posts: 288

Steve McConner wrote ...

Not to be confused with a "gravy ton", which is like a crapload, only runnier.

A runny crapload? EEEeeeeeuuuuuww

That's gross!

wrote ...
Einstein's way of putting it was that gravity was a distortion of space-time. An object with mass (mass-energy, even) bends the fabric of space like a bowling ball on a trampoline.

Well, it's actually a little more complex than that. A bowling ball on a trampoline depicts a single tangent plane. But in reality, there is an infinite number of tangent planes (trampolines) that surround the bowling ball over its entire surface. I realize that the single trampoline depiction is easier to understand and to draw than an infinite number of trampolines, but it doesn't tell the complete story.

wrote ...
Nobody really knows the fundamental "reason" for inertial mass. But I've heard there are certain magical substances that distort the fabric of space-time so badly that it's impossible to get off the couch.

Not true! We know exactly what that "magical substance" is that prevents us from getting off the couch. It's called "junk food".

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