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Chorus Powernet
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<font face="Verdana, Arial" size="2">Originally posted by JustHalf:
Originally posted by Koopa:
why does a satellite have to be in high orbit to have a 24 hour/orbit time?
</font><font face="Verdana, Arial" size="2"> Fear. This guy called Newton said "Oi you flamin' satellites, you do what ai say may-tee!" and out of fear they did.</font>
CreeD digs around the dust of his brain and trys to ressurect that college course..... Higher sattelites actually move faster than lower ones, not the other way around as was stated further up. To be geostationary it's angular velocity must match that of the earth's surface (Think of it like cd/disk drive technology, at a constant angular velocity (proportional to rotational speed) you will read more data off the further tracks, as more distance is covered per degree of rotation. It's the same with the sattelite.). It is true though that gravity gets weaker as you get further away so the sattelite velocity/mass and distance also has to be arranged in such a way as to go fast enough for it's centripetal force (it's velocity/vector is pushing at a tangent from it's orbit) to counteract the force of gravity while not pushing it away from the earth.
It's just like putting a stick on the end of some rope and swining it. To get it off the ground and swinging in a stable circle you have to get it going fast enough to have enough centripetal force pushing it away from you (The fulcrum) to counteract the weight of the rop (which if the rope were gravity would be pulling it towards you rather than down). However if you rotate it too fast the rope will snap, hitting your little brother in the head and getting your chocky bikky ration cut...
Things to rant about over morning coffee....
..... I haven't touched a physics book in 6 years so if this is blx ...sue me....
Ps. Newton's theory is actually wrong. It works for most 'small' calculations but Einstein proved it was lucky rather than correct. It's properly defined in one of his Relativity theorems afaik. But as usual they still teach Newton's theory (god forbid they'd start telling kids which way electricity really flows either....)
[This message has been edited by _CreeD_ (edited 11-05-2001).]0 -
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<font face="Verdana, Arial" size="2">Originally posted by Moriarty:
Do they take over your eircom phone line, or do they give you a second line, that is connected over their ariel? EG, do you get to keep eircom line, and the chorus one is in addition?
Im prolly getting it in june, depending on a few things.
</font>
i sent you this mail moriarty:
no problem my man, where u located anyway? im in limerick so thats where my info is for.
1. right here it is. powernet is seperate from the phone and tv service.
a. So if you get powernet, you get a dish on the roof pointing to keeper hill and a cable modem.
b. if you decide to go for digital tv they will ask you to get the phone or they will charge you 60 squid for the tv install.
c. the "phone" chorus installs is actualy a dish on your roof and called wireless local loop, so yes you can keep your connection to eircon if you want to, but the advantage of chorus is that there is no line rental, all you pay for are your phone calls, and they "say" that it's 15% cheaper.
d. i got my eircom line taken out and chorus brought in, so you lose your old number and you get a new chorus one.
2. i have no idea if they monitor it yet, i can let you know in a month when i get my first bill
g'luck
yank
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<font face="Verdana, Arial" size="2">Originally posted by Poopman:
10 miles = 53,800 feet
wouldn't a "fixed" satellite at this height have a major problem with both gravity and aircraft??</font>
The highest planes (ie) concorde flies on the edge of space which is still below this.
and to Hobbes who said
it's 35,800 kilometers above the equator, or 22245.089 miles.
we were actully talking about low orbit satellites
low orbit and ten mile up is constantly moving and so is flying.
low orbit for satellite internet are 25 times higher, but are not in use yet.
[This message has been edited by chernobyl (edited 15-05-2001).]0 -
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<font face="Verdana, Arial" size="2">Originally posted by daveirl:
1) The satelites Mass is independent of it's period and attraction to the earth.
2) The Centripital Force is towards the centre of the circular orbit in effect it is the gravitational force. </font>
NITPICKER!!!!!!!!!!...
ON 1, The gravitational force on an object is directly proportional to it's mass (And that of whatever it happens to be orbitting). So mass is definitely a factor.
2 - You're probably right about the terms, I always mix up centripetal and centrifugal...anyway, 'the bit that's making it want to zip off at a tangent to it's orbit' 'tis what I mean.
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Was just fiddling round with somin earlier, and decided to do some figures.
Each gig over 3gb per month will be £20.
That means, if you downloaded constantly 24x7 for a month, youd owe chorus over £2000 for the month in exceeded bandwidth
Moriarty
mrmoriarty@eircom.net0 -
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thats cool with me...m8
im happy to give them 40 squid incl vat for what it costs me to to download a file this big with eircom on isdn per month ----> .
oh and did i add, i get 10 gbs in under 60 seconds? as for 20 squid per gb over 3gb limit...your a fool if ye think that aint a great deal....see u in 2007 when u finally get something better.
but seriously dont get it, cuz i dont want to share the bandwidth,....lololololololololololol
gah, must sleep now.
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