Phiredude Posted October 8, 2004 Share Posted October 8, 2004 hey what up again. ummmm... a couple weeks ago, i had to do a project for science to make a machine give as much work output as work input(obviously impossible, but he wanted us to get as high as we could). well i got a 92 on the project,but i only got about 50% output i think. he didn't give us a way to gauge it. does anyone know if there is a perfect machine? and if there isn't, what do you think would mae one. i know if someone figured it out, a nobel prize would be hanging on there wall, i just want to hear some of your opinions. Link to comment Share on other sites More sharing options...
Cap'n Refsmmat Posted October 8, 2004 Share Posted October 8, 2004 http://www.scienceforums.net/forums/showthread.php?t=5234 Link to comment Share on other sites More sharing options...
Phiredude Posted October 8, 2004 Author Share Posted October 8, 2004 oh, sorry. i should probably search before i start posting things. again sorry. Link to comment Share on other sites More sharing options...
YT2095 Posted October 8, 2004 Share Posted October 8, 2004 things like twisted or stretched elastic bands work quite well, some of the energy is lost in heat and sound, but it`s minimal, Springs work quite well too. perhaps a device that employed these would be a good idea? "there`s no such thing as a free lunch" though. and so, no machine will work at or above unity. Link to comment Share on other sites More sharing options...
coldfire Posted October 13, 2004 Share Posted October 13, 2004 i have a idea for a machine that could put out more energy (electic) that u put into it but i have one probleam i have to make a shaft have no weight or no resitance just float so that i spin it and then make it real long sence there is no resitance u make it long as u want and still use the same amount of energy to spin it and then wrap a coil around this charged shaft and u could get ac.... Link to comment Share on other sites More sharing options...
Phiredude Posted October 13, 2004 Author Share Posted October 13, 2004 well as i was telling honz415. i think i thought of a way to use friction to your advantage. i mean, think of how bumper cars work. they create electricity by rubbing up against the metal right. well not all the way, but i am sure you can use friction to your advantage that way Link to comment Share on other sites More sharing options...
coldfire Posted October 14, 2004 Share Posted October 14, 2004 friction will creat heat...... and i need something that will not slow down.. something that u spin it and nothing will stop it = no restance....../ no bearing nothing.... just gutta figure out a way to hold a metal (mangtized) shaft up using only magnets... Link to comment Share on other sites More sharing options...
pi_of_9 Posted October 14, 2004 Share Posted October 14, 2004 How about a metal that floats, the bouyancy could hold the metal in place while a magnet or something spins it. No friction, but perhaps resistance from the liquid. Link to comment Share on other sites More sharing options...
[Tycho?] Posted October 14, 2004 Share Posted October 14, 2004 How about a metal that floats, the bouyancy could hold the metal in place while a magnet or something spins it. No friction, but perhaps resistance from the liquid. Which is friction. Liquids have friction as well. Link to comment Share on other sites More sharing options...
mak10 Posted November 9, 2004 Share Posted November 9, 2004 friction will creat heat...... and i need something that will not slow down.. something that u spin it and nothing will stop it = no restance....../ no bearing nothing.... just gutta figure out a way to hold a metal (mangtized) shaft up using only magnets... this is possible in a complete vacuum. say, come to think of it... are perpetual motion machines not possible in outer space?? -mak10 Link to comment Share on other sites More sharing options...
swansont Posted November 9, 2004 Share Posted November 9, 2004 this is possible in a complete vacuum. say' date=' come to think of it... are perpetual motion machines not possible in outer space?? -mak10[/quote'] Dr. Seuss might answer like this: Not on the ground, and not without sound. Not in a house, and not with a mouse. Not in outer space, or any old place. That second law of thermo prevents you from running that turbo You cannot make energy for me You cannot make energy for free! Link to comment Share on other sites More sharing options...
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