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(url="http://"http://www.dictionary.com/cgi-bin/dict.pl?term=escape velocity")http://www.dictionar...cape%20velocity(/url)
Dictionary.com's definition. I think we've beaten a dead horse repeatedly here with what the actual definition is, so iLock.
Although, I must say, this has been on of the more interesting "off-topic but somehow on-topic" threads I've seen.
Edit: Re-opened by public request.
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(This message has been edited by EVula (edited 11-14-2001).)
Quote
Originally posted by Starkiller: **Gravity is the force of attraction between two bodies. The attraction is always there, but it is so minute that it doesn't make a whole lot of difference. **
The same could be argued for atmosphere. To my knowledge, space is not a true vacuum. It's filled with free floating hydrogen atoms and the like, just not very densely. So that could be considered the outer edges of an atmosphere for some planet or comet. Although I did read today that the atmosphere (for earth) is generally considered to extend ~40 miles out from the planets surface.
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As many people have stated, and looked up, escape velocity is the speed an object needs to escape a gravitational mass, completly, as gravity extends forever, but the force of gravity decreases at a rate of the range from the center of mass squared, so if you go two earth's radii out, the force of gravity will be 1/4 as much as at one earth radius out (ground level). The escape velocity from ground level is 11.2 km/second.
The equation for escape velocity is:
V = (2GM/R)^.5 where G = universal gravitational constant which = 6.6726x10^-11 N*m^2/kg^2 M is the mass of the gravitational body and R is the distance from the center of mass of the gravitational body.
Since everything has mass, you could say due to Universal Gravitational Acceleration, EVula is attracted to forge, and their escape velocity from each other is approximently 0 m/s
Terminal Velocity is the maximum speed in which an object can fall before the effect of air resistance provides a greater force than the acceleration due to gravity, in which case your acceleration is 0, and your velocity is quite high and you die when you hit the ground, probably not knowing you hit terminal velocity.
This concludes your physics lesson for today. Have fun.
Chamrin
Jimbob, trying to absorb what he has just read, explodes. To much info for a 12 year old mind!
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Originally posted by Chamrin: EVula is attracted to forge
Not in the least. Good guy, but no. (url="http://"http://www.evula.com/reviews/misc/cara.html")Cara,(/url) on the other hand...
Wow, I'm impressed, I've never read anything so cute and caring (that I can remember). Very very nice EVula, though according to universal attraction, you are attracted to Cara almost exactly as much as you are attracted to forge ;). Though if you are closer to cara, you'll be attracted more to her, even if forge probably weighs more.
Cool! Mods are posting more. I like this! I actually learned something from the Math/Astronomy lesson. It's hard for me to follow Math, since I've got a C- in it. :frown:
Mind if I ask something Mods? It's sort of off-topic, but... :
I watched, on the Bio graphy channel, the 100 Men and Women that Changed The World of Last Century... Anyway, there was an astronomer - Galileo I think - that came to learn that if one goes faster than the speed of light, time goes backwards and you get younger. Food gets richer, etc. I asked my teacher if this was true. She said, and I quote: "If it wasn't true, they wouldn't say it." So, mind if anyone explains this? I, personally, think this is impossible... but there was no beginning to God, and Space doesn't end, so that seems pretty much impossible too, but I believe them.
Man-o-man! This is all too much for a 13 year old to handle. But please, enlighten me oh great teachers. <----- taken from the bible when one of the apostles (forget which one, I think John) asked the Lord to teach him.
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Einstein came up with that. It has to do with the general theory of relativity. According to theory, it says that the faster you travel, the slower clocks work. The theory also states that the speed of light is the built in universal speed limit. So, when light travels, the light feels no difference in time because it is at the speed of light, at which time doesn't move. So, by breaking the speed of light, time goes backwards. There have also been tests on earth in speed of sound jets that prove the more speed you acheive, the slower time goes, as the clocks slowed down by a fraction of a second on the plane.
So, two twins, Bob and Bobette (20), are living. Bob goes on a mission to Mars, and Bobette stays on earth. Bob's spaceship travels just below the speed of sound. So, It takes Bob 2 earth years to get there, stays five earth years, and takes two are years to get back. When Bob meets Bobette, Bobette is 29, but Bob is only 26. See?
Originally posted by The Space Between: I watched, on the Biography channel, the 100 Men and Women that Changed The World of Last Century... Anyway, there was an astronomer - Galileo I think...
Odd, since Galileo died in 1624...
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Yeah, I don't think Spacey knows much about Science and Astronomy.
Originally posted by Jimbob: **There have also been tests on earth in speed of sound jets that prove the more speed you acheive, the slower time goes, as the clocks slowed down by a fraction of a second on the plane. **
How can they tell?
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digital clocks. duh!
Originally posted by Chamrin: **< snipped for length>
<snipped for length>
Chamrin**
Hmm, reading this post, the first thing that I thought was, Chamrin = Dr. Ralph, perhaps? That would be interesting.
While I'm not exactly up to par on the theory of relativity, my physics teacher in high school said only a few people on earth really have a good understanding of it, people like steven hawking and such... The equation used is E=mc^2, which means mass and energy are proportional by the constant, the speed of light squared.
I was going to write more, but I got distracted and forgot what i was writing about.
Originally posted by Macavenger: Hmm, reading this post, the first thing that I thought was, Chamrin = Dr. Ralph, perhaps? That would be interesting.
I'll take that as a compliment, though I don't have a doctrates degree... yet.
Originally posted by Chamrin: **While I'm not exactly up to par on the theory of relativity, my physics teacher in high school said only a few people on earth really have a good understanding of it, people like steven hawking and such... The equation used is E=mc^2, which means mass and energy are proportional by the constant, the speed of light squared.
Well, I was reading book on theories that I found, and that was pretty much what it said.
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That equation that Chamrin put out is what is necessary for modern day fuel calculations. Which factors in how much fuel is spent in take off and how the load is ever-lightening on the way up as it burns. If you want to know the velocity necesarry to escape gravy its +9.8 meters per second^2. gravity is -9.8m/s^2 negative because it is going down. so with an accelaration (not constant velocity) of 9.8 you would jump out of the atmosphere. But to attain that actual VELOCITY necessary you must maintain a speed of which is: (distance to exit the atmosphere)/9.8= Vf. 0=Vf^2 +9.8 * distance traveled if i knew the distance it would be easy to calculate but I dont.
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(This message has been edited by Matrix (edited 11-21-2001).)
Originally posted by Matrix: the velocity necesarry to escape gravy
Aww, c'mon, its almost Thanksgiving, you don't need to escape gravy.
hehe. Yeah, It's immposible to escape gravy. Jimbob tries but finds himself dumping it onto his stuffing seconds later