gravity

I was watching Abby's talking with dorks video just now and at about 1:30 there's a guy making the infamous "speed of gravity" argument. And it got me thinking; has gravity been shown to have a rate of propagation? If yes, what is that speed? What would happen if the mass of one of the twin...

Ok, I have a few questions and I am going to try to write it out in the correct fashion. There are 2 planets in 2 identical solar systems but not connected and both are in seperate vaccums. If one planet was earth and the other planet was identical to earth but rotated on its axis slower...

Alright lets see this is my first post and I'm gonna make it good, or at least try. Has anyone heard of any known hypothetical ways to extract energy from gravity without resorting to fusion and massive bodies of matter. It should be possible but I haven't heard anything.

I just remembered seeing this program on TV some years ago where a russian scientist showed how he defies gravity. (At least to a small percentage) I googled it up this morning and I mostly find whacky sites (those with strangely cloloured backgrounds, suggesting tin foil hats...) about it which...

I heard something yesterday that I couldn’t think of a counter argument for. This guy claimed that the underpinning of astrology is rooted in gravitational theory. Every object in the universe exerts gravitational pull on every other object in the universe – if ever so slightly. So, our sun...

I just wanted to say that if two objects that had the same mass while an artificial gravitational field was pulling on the smaller ball if it was rolling down a ramp at the same time as a bigger ball, then the smaller ball would roll down first if the artificial gravitational field was strong...

This is classic: http://www.theonion.com/content/node/39512 :D

Gravity is the equivalent of acceleration, according to SR. No test can tell the difference. Gravity has been shown, in accordance with GR, to cause time dialation. GPS clocks are set to accommodate for the fact that they're not as far down in earth's "gravity well." Clocks run faster out in...

I have got a new idea for an invention. It is a cyclical gravity greenhouse liquid capillary action energy generator. The idea is that the device uses the same ammount of liquid over and over again due to evaporaton, condensation and capillary acton to generate electricity. It works like an oil...

I had this awesome idea this morning. You know how old grandfather clocks work, right? You pull on a set of chains every morning to raise a set of weights. The clock essentiall runs on gravity power. My thought was to convert gravity power to electrical energy. I would have a small number...

The "skeptic" community prides itself on believing only what there is proof or evidence for. But I have yet to see the proof that there is a force called gravity pulling everything to the center of the earth. As I sit at this computer, gravity ought to be pulling me deep into the bowels of the...

I'm thinking about this and something doesn't seem right. It seems like it would violate entropy. A solar powered version would be nice though. http://www.machinedesign.com/ASP/strArticleID/56635/strSite/MDSite/viewSelectedArticle.asp

Hello all, As mentioned by me in other topics--apart from other points about possible working of homeopathic/TRS remedies, Technicals as Quantum-- Photons, Waves, Gravity etc. are some concept which possibily can be related to it. In the interest of addition to scientific knowledge--we...

I know that there are a lot of people who believe that the Earth and everything that has mass in the universe has a gravity field and there are others who think that everything in the universe has a gravity well. I found a contradiction. I heard in a book about Einstein's theroy of gravity when...

I have been challenged with the followinng question by a fundy: "If the mass of the moon is low - about eighty times less than the earth, why is the gravity so high (about one sixth that of Earth's)?"

http://www.fuellessflight.com/index1.htm Sounds more like a perpetual motion machine to me.

what became of those experiments?

This is very fascinating. Check it out: http://www.atnf.csiro.au/news/press/double_pulsar/

http://www.fortunecity.com/greenfield/bp/16/lazargg.htm What's the science behind this? Is this b.s.? Is it possible to generate artificial gravity?

say the sun popped out of existence. we wouldnt know for around 7 minutes because of it's distance and how long the sun's light takes to reach us. ok, simple enough. but if the sun popped out of existence would it's gravity exerted on us (and every other object in our solar system) cease...

Question from a third grader's science homework - does an airplane need gravity to fly? There seem at least three possible answers: 1. An atmosphere would not form or stay contained if gravity was absent. (the wisea$$ answer) 2. No, because lift is a function of only velocity and air density...

I'm having a bit of trouble fully understanding the replies I got over in Banter so I am jumping over to Science. I tried searching the net and came up with values between 0.1 and 1.0 % which seemed like a large range. So if I had a uniform cube large enough to easily measure the...