I would like to know what the trampoline or space is made out of.
Posted on 10/18/2004 12:27:05 PM PDT by roaddog727
Imagine the weight of a nagging suspicion that what held your world together, a constant and consistent presence you had come to understand and rely on, wasn't what it seemed. That's how scientists feel when they ponder gravity these days.
(Excerpt) Read more at msnbc.msn.com ...
It is not. See my previous post. :-)
Gravity waves should move at the speed of light.
See:
http://math.ucr.edu/home/baez/physics/Relativity/GR/grav_speed.html
I love this thread. Conjecture about that which nobody can know. Ain't enough info for anybody to draw a conclusion about anything, but everybody has an opinion. What is that old saying? Ne'er mind.
Nobody can know? Ever? That seems wrong on so many levels. Not know now, but then 102 years ago everybody knew that it was impossible to fly too.
Gravity = pizza + beer + football
So does that mean that our orbital plane is offset from the galactic plane by 36.5 degrees or 83.5 degrees? The Earth's equitorial plane should not matter.
Thanks for the information.
Gravity gets me down.
Thanks for the ping!
I'm just thankful that this all happens in three dimensions instead of two. Otherwise we'd really be all squished up. Lucky us.
She would have the same mass. However the gravitational forces pulling her Rotundness towards the moons surface would be 1/7 of that here on earth so roughly about 100 ft/lbs.
I used to think that gravity was a waveform, mainly after leaving some parties in college.
Now I just think that gravity is what happens when the universe gets tired of waiting to see what will happen in the absense of any other force. It's the *dosomethingfercryinoutloud* force.
Except for Tuesdays and Thursdays when gravity is a particle, and has office hours from 2pm to 4pm.
Down, doobee doo down down?
After this election, no matter which way it comes out, I will need one or more pan-galactic-gargle-blasters!
Peter Jackson needs to do the movie.
I would like to know what the trampoline or space is made out of.
The Planck length is 1.6E-35 meters. The approximate radius of a proton is 2E-16 meters to give you a bit of scale. The only way a Planck length black hole would interact with the rest of the universe would be through gravitation. Since its total mass is about 1E20 atomic units (a bit less than a mole of protons) the gravitational effect of one is nearly impossible to detect. They are strictly theoretical at this point.
Since they are so small, ~20 orders of magnitude smaller than a proton, there isn't much chance of them running into matter to devour. In order for PLBHs to account for dark matter there need to be on the order of 100E6 of them in the volume of the earth.
The speaker made a pretty good argument for them being created by the boatload during the inflationary period of the early universe. Sadly, we were coming to the end of the hour and he glossed over the math in order to cover the material in the time permitted. A google of Planck's Length Black Holes lists a plethora of resources. Have fun!
regards,
LOL!
Disclaimer: Opinions posted on Free Republic are those of the individual posters and do not necessarily represent the opinion of Free Republic or its management. All materials posted herein are protected by copyright law and the exemption for fair use of copyrighted works.