alan2here

The graphite\bistmuth expement runs for a long time only slowing down rotation by air resistance, It would be intresting to know how long it would take to (lets say half in speed of rotation) if it was done in a vacume (or a tube that had no air inside it), partucuarly intresting as you could keep speeding the roatation up from outside (lets say shining light onto it, also involves black and reflective surfaces) and almost nothing would be ever slowing it down (only eddy currents in neerby paro\fero magnetic objects).

This sounds like an effective way to produce a verry, verry fast change in tempreture? Im fealing lost trying to find out infomation on the rest of the intenet, anyone know what the most effective material is and what the tempature change for it is?

TY, I put it in physics as it is it's physical properties I am interested in, however I agree yes it is more a chemistry thing. I think for price reasons I will have to stick with the inferour yet much cheaper woods metal. http://cgi.ebay.co.uk/Woods-Metal-Ingot-100-grams-mp158-F_W0QQitemZ160177579062QQihZ006QQcategoryZ413QQssPageNameZWDVWQQrdZ1QQcmdZViewItem

Is there anywhere that sells it at cheaper that this? http://www.goodfellow.com/scripts/web.wl?MGWLPN=MNT&PROG=SEARTOW&LAN=E&HEAD=GA00&SPAGE=GA00 Shockingly the g seems to stand for grams. Where is this moved? Chemistry?

Oxygen could be tricky. Edit: Ahh, it says it's ok in oxygen that is in air. Thanks :¬) None on ebay :¬(

I always though Gallium was perfectly safe. However just as I look it up on ebay to buy some I find this. http://www.acialloys.com/msds/ga.html Anything there that could be a problem with handling it? It's a metal, can it really catch fire? This guy is going on a lot about his metal being so unique, however is this not a similar behavior to gallium? http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&item=160177584795&ssPageName=ADME:B:SS:GB:1123

http://www.sciencefirst.com/pctr/10085.JPG :¬) Lots of fun The trouble is they can also be more like Tesla coils. http://education.jlab.org/glossary/vandegraaff.jpg If you are not careful.

Wiki is really useful, there are lots of conspiracies about how it could in theory be inaccurate, Ive never had any experience of that myself. It will by it's very nature occasionally be inaccurate for a very short length of time, just after a stupid edit or during an edit war where nobody can agree before a decision is reached. However the chance of you hitting one of those times when going on an article IMO is very low.

Sorry to disappoint you guys, but reality is analogue not digital. It's unfortunately not a computer simulation.

Hooray :¬) Yes, thats it. Great idea isn't it. In the end everyone is more happy than before. In the real world the loads of employees at the car factory tend to not like it when all there jobs are replaced by a robot that does it all for them and is operated by one engineer, maintained by another and built by a small team of other engineers. In the long run more programmers, scientists and engineers and less people who love to do tedious manual work would make the world a much better place. This is a bad example as car factory's tend to do this, lots of other areas don't though. It's understandable to think of personal gain beyond a better future, I think everyone probably does it to some extent. lots of people not working has problems such as the ones indicated in the last post, how do you share the money out fairly and not end up with all the problems of communism? For this to happen I think the world needs to almost be able to tick over without to much work people need to be paid for (as opposed to work people do only because they enjoy it), thats not going to be the case for a long time.

bump

Just tried it with the foil, I get as much buildup of electricity as with a small metal tube I have, it's rather less impressive than I imagined from YT2095's description however I think he is probably right about it eventually being able to light a cigerette.

The range is the important thing, nobody cares if you transmit around your house. Nobody cares if you transmit to your whole street if you are not interfering with anything, as nobody can tell, however you may well be and not know about it, so to be safe if you are transmitting at any distance find out what ranges are legal for what you want to do.

bump

Simplify please

As I said in my last post larger metal objects hurt. The small black burn is gone now, it was not there this morning.

The foil does sound like fun, if it wasn't so risky I would be doing it now.

If a bike was built that couldn't steer and it was projected forwards at a high speed then it would fall over fairly quickly, therefore it must be to do with the turning of the front part of the bike that does it. I think maybe the front turns right slightly as the bike leans right and vice versa with left, when moving fast the handlebars will turn faster. I found I was unable to keep a bike upright for more than a few seconds when it was stopped without putting my feet on the ground. Riding no hands is also rather difficult. Therefore it is not too much of a surprise to me that this can't be ridden no handed.

The gaseous wire of plasma that came off the large collector of a spare door handle that is not correctly connected to any doors hurt when I accidentally got the back of my finger just above the nail to touch a corner of it, I was then using things that are smaller. I was hoping for large arcs to go between the ball and nearby objects and now realize that 10cm isn't going to happen if I am nearby as this was still roughly 1mm. I'm thinking of a novel bugler proof system, that zaps the burglar when they try to enter the restricted zone, like get into the art gallery at night. Corners\Edges of the metal items, where on your body and how sweaty you are all seem to make a difference. The fealing is so amazingly and purely unplesent, im glad most of it stayed on the other side of the glass. Ive stopped now, just made a tiny black bit in the end of my finger (that oddly did not hurt at all) and decided that there was nothing else to discovered by doing this experiment as I think I now understand how the electricity will behave. The ball is so good at killing electronic stuff, Ive only done this once with a calculator I didn't want anymore but it was very quick to make it produce errors and turn itself off with an odd chirpy bleep, it then took a few restarts to make it recover, which got me thinking at the time that I should keep my head away from the ball (which I have been doing). Since then I have looked more closely on a couple of occations to see things happening inside the ball. The plastic the ball is made of seems to often smell of dust even though it cant possibly be dusty. Ive heard once that electric fields attract dust in a room. Which could enplane this.

I have a Lightning Ball. The next paragraph will describe it and the behavior of the lightning inside it in detail, you make find it interesting but if you don't skip it. It creates purpley lightning in its center that becomes more pinky as it gets to the outside of the ball, it is not like tesla coil lightning in that it is more curvy and less angular. There are lots of strands of lightning that go from the center to the edge of the ball. The strands are attracted to myself. The strands branch at less points along there length than those of Tesla Coil videos I have seen but snake around more. The strands disperse as they reach the outside of the ball just before the edge. The ball produces flickery high frequency sound that is in the range of CRT tv's and florescent lights. Sometimes bits of the lightning especially those around the bottom flicker very quickly between two points and sometimes the strands at the top can jump backwards and forwards about 1.5x a second between two fingers\hands placed a bit of the top, sometimes the lines join together to create one that almost gets to the edge then branches at the last moment to join both hands, there is also odd effects that remind me of the unpredictable behavior iron filings sometimes take when used with magnets like a burst of individual lines around a strong point like when my whole hand is there or when two fingers bursts repel each other. Often when a hand in places at the side the lighting will strobe upwards then apear at the bottom again, it reminds me of videos of Jacobs ladders I have seen. I aslo know the ball kills electronic items that get to close to it and can cause an odd pulsating feeling on the hairs on the back of my hand but I cant always get this to work. I tried putting a tiny metal object of top, a little metal screw, as soon as I took my hand away the lightning primarily ignored it which I was surprised about. I then touched it very carefully expecting it to hurt like a static shock, however it didn't. I tried a 10p followed by a pound coin. The pound coil created lighting that could jump between it and a pin about 1mm away where the pin hand a plastic bit I could safely hold, again I tried it on myself and the lighting outside the ball could jump between the coin and my finger. I then tried touching something metal and got no static shock so I tried again holding something metal and using the tiny screw and then the coin, no problems. Ive come to the prahaps incorrect conclusion that it is safe to create the lightning on the outside of the ball. I'm aware of the skin effect and that playing with man made lightning can cause muscle damage that you are not aware that results in aching muscles. I'm not going to try anything bigger until Ive got some feedback.

Ok, I should have said should be 1*c faster. However with speeds of stuff that fast not adding up linearally (again see the link) Its not going to exceed the speed of light, revelistic effects like length contraction and time dilation make it all work out and with the speed of light actually being c no tricky maths is needed as the the observed speed from the side would be c.

The dip is an interesting phenominem however you are not going to break any fundamental rules of physics with it. You can levitate a ball bearing in a tube with it, however here the usually plastic or glass tube is also holding the ball bearing in place.

See my link, speeds of relativistic things don't add up linearly. I'm not implying anything moves faster than light speed.

This seems very related http://www.scienceforums.net/forum/showthread.php?t=28606 Length contraction seems to remove additional paradoxes I previously couldn't get my head around in this example. I was going to ask but then found that thread, so im posting a link for future people reading this thread. Edit: It was a little confusing what would happen if 3 spaceships where having a race, it would seem they would be able to relative to each other keep getting faster and faster but relative to a stationary observer just keep getting closer and closer to C.

from the observer beside the railway lines the train has come along, shone its lights, the lights have been projected at 1*c faster than the train is going as the train is projecting them forward, the train in traveling at 0.9*c, however the lights will only appear to be moving at c relative to the observer and the train at 0.9*c, from the observer on the train the light project normally but space seems distorted out of the front window due to length contraction. See my thread http://www.scienceforums.net/forum/showthread.php?t=26989 Tell me if im wrong please.