insane_alien

is there a way of measuring distance with out using regular events like the mile wheels the romans used that clicked every mile they travelled? its a conveinient way of measuring it. a force like gravity perhaps? yeah the external observer would(and does) observe a time difference. this has to be factored into the programming of GPS sattelites for them to work properly.

norman, do we have to petition for you to stop post these abominations you call jokes again? on a side note, a blind man walked into a bar. he's expected to make a full recovery.

i don't have a gamma camera. nor am i likely to want one. ever.

by the way, does your fiance know about your little hobby? or is it one of the plumbers?

yes it would replace them. and you'd need three at least. but then, the counterweights would attract each other which would cause quite a bit of instability and they'd fall down. but the junk i was talking about would be the sattelites launched up to now that would still be in orbit when one of these things is (being) built. THATS the junk problem. Those are the ones going to be smacking into it at a couple of kilometers per second.

you may remember that a while back i posted a little theory about what sayonara does in his spare time ( http://www.scienceforums.net/forum/showthread.php?t=22448&highlight=secret ) well, i've got MORE evidence! check out what he's selling. note the titles of EVERY single item. http://www.cafepress.com/sayo_sabotage

i'll agree with this. though, the new sattelites will be in a sufficiently high orbit so that they won't pose a threat to the towers ever.

Phi, i'm talking about the junk thats already up there. it isn't just going to magically disappear. either we go up there and collect it all bit by bit or we have ultra cool laser sattelites

well, we already track all of the bigger bits of debris up there so it would be trivial to predict a collision and how to move it out of the way in time. although, even then it'll take a while and smaller bits will likely hit it. I'm going to go with by the time we can put up a space elevator we'll have the technology to get rid of the junk. or lasers. you'll have plenty of solar power, chuck a couple of automated laser turrets on it every few kilometers. like the anti missile systems on ships.

try 36 thousand. these things will be MASSIVE if they're ever feasible.

energy usually(always) does have mass. you do know the consequences of E2= (mc2)2 + (pc)2 don't you?

ah yeah. should have thought of that.

As a side thought, could UV light be used or would that damage the blood itself?

depending on how far out the top bit is an where it breaks then you might not be coming back to earth. mos likely you'll just be left stranded in an elliptical orbit. if you are then you could probably use an escape system

Carbon nanotubes have the tensile strength to hold the counter weight and a sea platform would be able to cope with winds and reduce the bigger problem of satelites. nothing would be worse that a big bit of spacejunk slamming into it. on the plus side, if it did snap the the portion that falls to earth will mostly burn up. meaning the first 100km or so will just coil up around the baseand everything above gets vapourised. another bad thing is that if it falls there will be a big rise in CO2 from the burning elevator

i'm not stalking you i just have time to kill. It is a reasonable question, just like your other one. just so happened that neither works. keep asking they're a nice change from some of the crap that washes up here.

yes well, i was reffering to macroscopic things like us. we're made of fermions so we can exist in the same place as someone else. i was trying to keep it simple by not going into the intricases of QM

well, theres more going on in a fever than a bit of heat so it would be pretty ineffective. infact, it might even help accelerate the spread of the virus causing you to get ill sooner.

no we travel through it. we can slow down the passage of time (by going faster through the other three dimensions ironically) so it is something we travel through. and reality doesn't care what you think. reality does what IT wants. not what YOU want.

okay, back to the doors but we'll simplify it further. no two objects can exist simultaneously in the same space. if we take away time then we have no two objects can exist at the same coordinates. since. for practical experience, we see objects passing through the same coordinates all the time. (the doors were meant to be an example of this) then there must be another dimension to account for this. we call it time. it really can't be made much simpler without losing meaning.

well, can you provide an alternative way to explain movement without a dimension that performs the exact same function as time?

you do know that force is kilogram-metres per second^2 don't you? it depends on time. also, this means that if you fired any two objects towards the same spatial coordinates then they will ALWAYS collide. this is obviously not true as two people can walk through a door in different directions without colliding. if the universe only had 3 spatial dimensions then there would be a collision. if there is time then it is possible.

no, its really a dimension.as you speed up the dimensions rotate into each other. so you have time becoming space and space becoming time. its also a dimension in the coordinate form. for two objects to collide they need to have the same x,y,z coordinates but also the same time coordinate. its no good if they have the same x,y,z coordinates if one object has them at 1,000,000,000 BCE and object 2 comes flying along tomorrow.

well, if you look at relativity, you'll see that its a dimension. so asking if you can ignore time is like asking if you can ignore up and down or anything off to the side of you because you don't believe the side is necessary and its just a conveinient trick.

matter is not the source of gravity. MASS is. photons have mass(relativistic mass) therefore they have a gravitational field albeit tiny.