gravity

The Science Channel (I think) recently presented a program on the eleventh dimension - apparently a Harvard physicist started wondering why gravity was comparatively so much weaker than other forces (except, I guess, the weak force?) and figured out that "the math works perfectly" to explain why...

Every representation of the solar system I know represents the planets revolving around the sun, all pretty much on the same horizontal plane, like rings of Saturn. Is this actually the case in reality? If so, why are there no planets revolving around the sun on the vertical plane? And how...

OK, I was inspired by a blurb from a NOVA program by Dr. David Brin: here is the 30-second audio: http://www.pbs.org/wgbh/nova/blackhole/expl-brin.html So. You have some kind of marvelous spacecraft that can set you a yard out from the event horizon of a singularity. You reach out and poke...

So, I was reading about this guy Alexander Diem who set a skydiving speed record of 313mph. But nowhere did it tell me how long he spent in freefall. I calculated as follows. 313mph *5280 = 1,652,640 feet per hour /60, /60 = 459.0667 feet per second So, I hear that falling bodies...

A very interesting analysis of the phenomenon... Thermal Modeling Accounts for Some, But Not All, of the Pioneer Anomaly I'm interested in seeing what the follow-up research shows once they've taken into account long-term effects of space exposure on the materials making up the probe.

Gravity or Electromagnetism(EM)? Which is stronger? Which matters most? In another topic, which is about Plasma Cosmology, whatever that may be, the statement came up again, about Gravity being "stronger" than Electromagnetism. The first time I saw that I simply checked, and EM is 1039...

Yep it’s grand claim time. I have read a lot of pop science physics recently and the other day realised I was picturing 3D space in a particular way. Thinking about it more it seemed to explain how things are influence by gravity. My explanation is below though it may contain errors, I have a...

In general, we have assumed (historically) that gravity is a force. Allow me to introduce very mundane analysis on why I believe we shouldn't have this concept anymore. Also please tell me if I'm wrong and why (we are still looking for gravitons, there must be good reasons for that)...

Okay, is it just me or does gravity not make sense? I guess I get confused by over thinking it but here's what I gather from all my years of public education. We are all living on a GIANT sphere that is rotating right? If I'm not mistaken we are spinning pretty effin fast too, right? Well, the...

If a hypothetical body, say a meteorite, for example, floating slowly through space ventures within the gravitational pull of, say a planet (yes, I know it's always within the gravitational pull of the planet, but let's say the overriding pull of the planet over and above all other astral...

Interesting article from the Economist on a phenomenon that has no explanation. http://www.economist.com/science/displaystory.cfm?story_id=10804075 I wonder what else we really don't know about the physics of the universe. I hope they figure it out someday.

COULOMB’S LAW ONLY VALID FOR RELATIVE MOTION RELATIONSHIPS Our experimental data confirms that elementary charged particles behave according to the expectations of Coulomb’s law when the interacting particles have relative motion with respect to each other, but what about when they don’t...

I'd like to get people's opinion of Alexander Franklin Mayer's physics. He claims to have come up with a theory of quantum gravity. To me it seems similiar to Milo Wolff's work. His pages are here: http://jaypritzker.org -Dave

http://www.washingtonpost.com/wp-dyn/content/article/2006/08/21/AR2006082101139.html Everything we know, everything we can detect, is only 5% of the entire Universe! - Extraordinary claim! 20% of the Universe is something we can't see or detect, that doesn't obey the laws of physics, except it...

Perhaps physicists don't yet know all there is to know about gravity yet. It seems that five flyby spacecraft have seen unaccounted for accelerations, and NASA physicists are looking for a new explanation...

On Earth when an object is affected by gravity in that it falls to the ground. In space an object produces gravity depending on the size and density. When you spin a sphere on an axes on earth everything on the surface of the object is repelled, and the opposite is true in space. What Produces...

So one of the parties blamed in that ceiling collapse is paying up and promising some answers: http://www.eyewitnessnewstv.com/Global/story.asp?S=7541980 The answer I'm hoping for though, and this has been bugging me for a while, is: Why the heck were they gluing 2-ton panels to the ceiling...

Question One - Various answers have been given, as to why Gravity is able to excape from a black hole - but none have addressed the fact that gravity has now been shown to travel at speed c. Question Two At speed c, time has dilated to zero - Therefore, from light's frame of reference...

Newtonian gravity...instantaneous action...curved spacetime...gravitons...????? I very much need a coherent answers: It is easy to accept gravity as a force...yet, Relativity describes gravity as merely curved spacetime. In terms of planetary orbits, curved spacetime around the Sun offers the...

Basically, why are there no plans to create near future spacecraft with some sort of artificial gravity? No -- not the Star Trek / Hollywood type, but the simple rotational 2001: A Space Odyssey type.

Hi I'd be interested if anyone has any views or comments (eg criticisms) regarding 'Origin of Gravitational Force', something I wrote a few years ago ORIGIN OF GRAVITATIONAL FORCE Although molecules are commonly visualised as being similar to snooker balls, according to the Quantum...

Im wondering. We can simulate a zero gravity environment by letting an object to fall without being restrained by anything (eg, air). But what a subject is experiencing in that situation is precisely the effect of gravity!! So, why is this the same as, for example, being suspended in between...

Suppose there's an indestructible, perfectly straight shaft, from one side of the earth to the other, straight through the centre. Basically an earth diameter shaft. It's wide enough to accomodate one human. I jump into it. Would I almost make it to the other side, then get sucked back down...

"The sun stays in the sky instead of falling down. Gravity should be pulling it down but it just stays right up there." "Gravity: Doesn't exist. If items of mass had any impact of others, then mountains should have people orbiting them. Or the space shuttle in space should have the astronauts...

I understand that gravity is caused by the reaction of space-time to objects of mass. Which causes space-time to basically push in all directions against anything with mass in some attempt to even itself out. I also understand that when you move very fast your mass increases as does your affect...

Now here's a really interesting article from the Globe and Mail newspaper in Canada; it has a lot of different information, but at the end it says that some physicists now theorize that the reason why gravity is such a weak force compared to the other three forces in nature (electromagnetism...

At http://z10.invisionfree.com/Loose_Change_Forum/index.php?showtopic=2076&st=150 LC's water_bender is happily claiming that, in air, a soap-bubble will fall at the same rate as a similar size golf ball. ( ooops - sorry, most of us are banned from even looking ;) ) Can't take <erk> much...

In Randi's latest commentary at http://www.randi.org/jr/2007-01/010507phil.html#i9 , he laments that: Well, personally, I think these three questions are EASY to respond to! 1) Evolutionary psychology. 2) Because more fundamental laws of the universe require it to exist. 3) The hummingbirds'...

I was going to put this in Entertainment, but it probably belongs here. I have $25 riding on this. Warning: some spoilers below. During the shuttle sequence in Superman Returns, right after Superman separates the two vessels, the 777 it was piggybacked on gets pulled into space and everything...

Many years ago I heard or read that Earth collects enough space garbage to increase its mass by 100,000 tons per year. I could be wrong or I could be mis-remembering. But, my question is, if this is true then would there be a significant diference in gravity from the dinosaur era to today...