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(...) I guess it would be based on the surface material properties. Different materials have different thermal emissivities, so picking one with a high value would be better for cooling directly to space. Of course these materials may be impossible (...) (23 years ago, 28-Jun-01, to lugnet.space, lugnet.off-topic.geek)
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(...) What material would serve the best purpose for cooling off directly in space and would this material work in space to prevent the plasma that powers my space craft from overheating and making my space craft explode into a million pieces? Jesse (...) (23 years ago, 29-Jun-01, to lugnet.space, lugnet.off-topic.geek)
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(...) I get 3.5 days, ignoring the motion of the earth toward the moon. Don't worry about the cookie - LUGNET provides free cookies for us all. :) Jeff J (23 years ago, 29-Jun-01, to lugnet.space, lugnet.off-topic.geek)
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(...) Holy cow, it's that long?! Man, cool or not, forget that..., too long! Call me when the moon's an hour away. Now *that* would look cool, if it was the first time you'd looked up in a few days. Plus, the apparent gravity on the earth's surface (...) (23 years ago, 29-Jun-01, to lugnet.space, lugnet.off-topic.geek)
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(...) I never spotted this before, but it's further proof that there's negligible friction in space. If there was, the Moon would have slowed down in it's orbit and fallen to Earth, and the Earth would slow down and fall into the sun. Actually, I (...) (23 years ago, 2-Jul-01, to lugnet.space, lugnet.off-topic.geek)
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(...) I have two questions to ask now because of the replies to this bulletin board message I sent in response to many other messages on the Lugnet Space bulletin board room. The first question is for Kyle D. Jackson and Jeff Jardine and it is if we (...) (23 years ago, 2-Jul-01, to lugnet.space, lugnet.off-topic.geek)
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(...) I get 1 hour, 13 minutes. Or 2 hours, 26 minutes. If I could remember the derivitive of y = x^2, I'd be more precise. Steve (23 years ago, 2-Jul-01, to lugnet.space, lugnet.off-topic.geek)
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(...) That'd be dy/dx = 2x. (I knew that calculus'd come in handy one day!) ROSCO (23 years ago, 3-Jul-01, to lugnet.space, lugnet.off-topic.geek)
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(...) Then it should be 2:26. Assuming that the relative acceleration between the Earth and the Moon is the sum of their local accelerations due to gravity. And assuming that acceleration is directly proportional to the force of gravity. Ie, when (...) (23 years ago, 3-Jul-01, to lugnet.space, lugnet.off-topic.geek)
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(...) Calculus, yet another form of mathematics that I am unable to do in my life. Jesse Long (23 years ago, 3-Jul-01, to lugnet.space, lugnet.off-topic.geek)
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(...) Umm... It's not a poke. honest. Your value for the Earth-moon distance is off by a factor of ten. which means your answer should be 2.25ish days. And... The force of the moon's gravity doesn't really enter into this. We know Force = (...) (23 years ago, 3-Jul-01, to lugnet.space, lugnet.off-topic.geek)
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(...) Actually, when calculating the acceleration and taking the distance into account, it's not so bad. For my first attempt at solving this, I tried converting gravitational potential energy into kinetic energy. The resulting integral was (...) (23 years ago, 3-Jul-01, to lugnet.space, lugnet.off-topic.geek)
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I should probably try to solve the problem myself, it'll help as prep for my college entrance exam. ;-) (...) Hmm, not bad at all - that gives people time enough to *realize* it's happening, broadcast it all over the world, and let everyone go (...) (23 years ago, 3-Jul-01, to lugnet.space, lugnet.off-topic.geek)
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(...) As regard the math, I wouldn't know where to start, but surely even if the moon we're sitting on the earths surface the earth would still exert more force than the moon so you wouldn't be weightless. I don't know if you mean't, at the point (...) (23 years ago, 4-Jul-01, to lugnet.space, lugnet.off-topic.geek)
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(...) Am I evil or annoying, Shiri? I am simply wanting to know and I want to know if you have built any LEGO sets of your own in your spare time. (We are evil! In-deed! Kaientai, WWF) Jesse Long (23 years ago, 6-Jul-01, to lugnet.space, lugnet.off-topic.geek)
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(...) Jesse, What does this have to do with the current thread? I also hope that you are joking (in which case you should be posting to .fun). Shiri is a good builder and a large contributor to the community. I'm a little confused as to where this (...) (23 years ago, 6-Jul-01, to lugnet.space, lugnet.off-topic.geek)
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(...) What's the deal with that Shiri person? She never has a bad thing to say about anyone, she's always got some positive contribution to make, and her posts are uniformly well-reasoned. I'm tired of her consistency and good-spiritedness--she's (...) (23 years ago, 6-Jul-01, to lugnet.space, lugnet.off-topic.geek)
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(...) I am simply wondering why Shiri hates me. I was joking in part of the letter, which also means I also probably watch too much wrestling. I also have never seen any of the work that Shiri has made and simply wanted to know if Shiri (not sure (...) (23 years ago, 6-Jul-01, to lugnet.space, lugnet.off-topic.geek)
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(...) Shiri is a woman who hangs out in the Castle sub-theme more than Space. You can check over there to see what she's made. I haven't made a castle in years.... (...) Sounds like severe weather indeed. However, you need to pay closer attention to (...) (23 years ago, 6-Jul-01, to lugnet.space, lugnet.off-topic.geek)
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(...) I think it is safe to say that Shiri (she's of the female persuasion) does not hate you. I doubt that she hates anybody, actually. Since this seems to be the "isn't Shiri great" subsection of the thread, let me add my kudos, she does a lot of (...) (23 years ago, 6-Jul-01, to lugnet.space, lugnet.off-topic.geek)
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(...) I read them in an electronic mail account but not necessarily the messages. I simply type on Lugnet, then they send me a copy of the letter and I post the letter, then I take the Yahoo copy of the letter and I delete that copy of the letter (...) (23 years ago, 6-Jul-01, to lugnet.space, lugnet.off-topic.geek)
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(...) I like the LEGO Castle set but I do not have the time (today) to speak with her. Maybe I can later? Please tell Shiri I said hello, is that acceptable, Larry? Thank you, Larry. Jesse Long (23 years ago, 6-Jul-01, to lugnet.space, lugnet.off-topic.geek)
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(...) The reason I asked was because the way that you read can influence how you reply. With the web interface, following a thread is easy. With mail it's still easy, but not quite so easy. With a newsreader, I unfortunately don't have any (...) (23 years ago, 6-Jul-01, to lugnet.space, lugnet.off-topic.geek)
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(...) I assure you, my boy, Shiri *is* a woman. I should know. ;-) <snipped the forecast> (...) Math is confoozing. In my mind. :-) -Chris (23 years ago, 6-Jul-01, to lugnet.space, lugnet.off-topic.geek)
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(...) I think that unless we can find a specific point at which Shiri is not a man, then we cannot demonstrate conclusively that she is a woman. Either Shiri occupies a spectrum of man-ness and woman-ness with no distinction, or a distinction (...) (23 years ago, 6-Jul-01, to lugnet.space, lugnet.off-topic.geek)
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(...) Whoa, that's something I never thought of before! It kind of raises an interesting idea, too. If this is always a trend for the satellite (i.e., "moon") of any planet with large amounts of liquid on the surface, then maybe over time there is a (...) (23 years ago, 7-Jul-01, to lugnet.space, lugnet.off-topic.geek)
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| | Evolution of Earth and moon (was: Couldn't resist)
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(...) Actually, you have this backwards. The friction of Earth's oceans against its solid parts is slowing the Earth's rotation down. This translates into a loss of angular momentum for the Earth. But angular momentum must be conserved. The angular (...) (23 years ago, 7-Jul-01, to lugnet.space, lugnet.off-topic.geek)
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Hi, Long time no see, John! Have you just been lurking about? (I'm finally back from Europe myself.) Coming to Brickfest? How's JHU? (...) Weren't there other methods used recently as well? I'm not sure that any would be as accurate as a laser, (...) (23 years ago, 8-Jul-01, to lugnet.space, lugnet.off-topic.geek)
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(...) Have you met Shiri before in your life? Jesse Long (23 years ago, 9-Jul-01, to lugnet.space, lugnet.off-topic.geek)
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(...) I would say yeah, he has, after looking at this (URL) =) ~Nathan (23 years ago, 9-Jul-01, to lugnet.space, lugnet.off-topic.geek)
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(...) I think they met once or something... (URL) (23 years ago, 9-Jul-01, to lugnet.space, lugnet.off-topic.geek)
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(...) How sweet. ;.) Love, unfortunately, has eluded me for every moment of my life. :.( Jesse Long (23 years ago, 9-Jul-01, to lugnet.space, lugnet.off-topic.geek)
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(...) Would there be any difference in the accuracy of laser vs. radar? I'm not enough of an EE geek to know, but thought "no" because they're just different wavelengths of the same thing, right? Or does the wavelength difference (it IS many orders (...) (23 years ago, 11-Jul-01, to lugnet.space, lugnet.off-topic.geek)
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| | Re: Evolution of Earth and moon (was: Couldn't resist)
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(...) Not quite. There's a good comparison here (URL) talking about speed radar versus laser. Basically the laser is more accurate, but requires more accurate aiming by the operator. ROSCO (23 years ago, 11-Jul-01, to lugnet.space, lugnet.off-topic.geek)
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(...) More accurate at measuring *speed*. We were talking about distance. Careful reading of both articles reveals no claimed difference in accuracy for distance measurement, since it's the same technique being used. (the speed difference is because (...) (23 years ago, 11-Jul-01, to lugnet.space, lugnet.off-topic.geek)
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(...) I've posted a few times this year, but mostly I've been lurking. And trying to build something that truly satisfies me. I keep buying more parts and experimenting... patience now... (...) Welcome home. Is the dissertation in the can? (...) (...) (23 years ago, 11-Jul-01, to lugnet.space, lugnet.off-topic.geek)
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(...) Isn't the theory behind rainbows (or light spectrums in general) that the different wavelengths refact by differing amounts, and so white light is "spread" into a spectrum of colours? If that's the case then radar and laser energy would (...) (23 years ago, 12-Jul-01, to lugnet.space, lugnet.off-topic.geek)
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| | Re: Evolution of Earth and moon (was: Couldn't resist)
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(...) My first inclination is that there should not be a difference. When measuring distances with light, the accuracy *can* be limited by the wavelength. I think one can measure accurately down to roughly half the wavelength of the light used. I (...) (23 years ago, 12-Jul-01, to lugnet.space, lugnet.off-topic.geek)
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| | Re: Evolution of Earth and moon (was: Couldn't resist)
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(...) I think most of this sounds reasonable, but I'd guess that laser still follows the inverse square "law". ROSCO (23 years ago, 12-Jul-01, to lugnet.space, lugnet.off-topic.geek)
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In lugnet.space, Jeff Jardine writes: <snip> (...) I'll address this point to fill in a bit of a hole, as a lot of the other concerns are past me. Yes, radio waves are affected by gravity which is why they travel along the surface, so in a sense (...) (23 years ago, 13-Jul-01, to lugnet.space, lugnet.off-topic.geek)
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| | Re: Evolution of Earth and moon (was: Couldn't resist)
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(...) I thought that the whole point of a laser is that it doesn't - it's a directed beam of parallel waves of light. The inverse square law is for a diverging beam. As distance from the source increases, the area the beam is spread over increases (...) (23 years ago, 16-Jul-01, to lugnet.space, lugnet.off-topic.geek)
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