Did you see the next two videos? The coil was replaced with litz wire. It more efficiently transfers energy without heating up and I used good enough insulation around the solder pot to keep the heat from transferring to the coils. The 14AWG wire used is just fine for the length of time the machine is used. They are cool to the touch even after running the machine for 10 minutes straight. The machine will only run for about 1 minute at a time anyway because the insulation is effectively keeping the solder in a liquid state for up to an hour after the power has been removed. I will probably replace the 14AWG with litz wires before I build the enclosure, but the wires are just fine for now. I also made an induction graphite crucible attachment in my most recent video. You spoke too soon. The smoke in the video is the flux, not the lead. It does not smoke when using a solder bar, but I ran out so I just added rosin core solder to the pot. Realize the boiling point of lead is about 3180F at standard pressure, so this is hardly giving off lead vapors if any at all. In the second video, I am running the machine hotter than necessary for the demonstration. I wanted to show the multicolor oxidation layers that aren’t as vibrant at lower temperatures. I normally cut the power once it hits 1000 degrees fahrenheit. Not hot enough for lead vapor to exist.
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With respect, I don’t think anyone expects Americans to park our cars and get on the train, hence just one of the reasons high speed bullet trains fail to materialize in the U.S. Lots of people who think we should build them for the environment, blah, blah, blah, apparently live in a dream world. Yes, the environmental benefits are there and provable, but Americans by and large can’t be bothered with them. Amtrak is not a failure just because it’s not efficient.
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Even at 570mA, you’re only getting a theoretical ~8000mAhr * 2 out of those cells, and that’s all the way down to 0.8V per cell. Based on his measurements of only getting 80mA @ 1.5V, you probably need more like 1V+ per cell (=2V total), which means you’re probably losing another 30-40% of the rated capacity. Now we’re at like 5500mAhr, which is easily into regular small lithium battery pack territory.
Runners-up: Jennifer Kapetanovich, Jersey Community High School; Lisa Whitaker, Maryville Elementary Granite City
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Methane has also been used as a carbon source. In particular it has been used to obtain ‘nanotube chips’ containing isolated SWNTs at controlled locations. High yields of SWNTs have been obtained by catalytic decomposition of an H2/CH4 mixture over well-dispersed metal particles (Co, Ni, Fe) on MgO at 1000°C. It has been reported that the synthesis of composite powders containing well-dispersed CNTs can be achieved by selective reduction in an H2/CH4 atmosphere of oxide solid solutions (between a non-reducible oxide such as Al2O3 or MgAl2O4 and one or more transition metal oxides). The reduction produces very small transition metal particles at a temperature of usually >800°C. The decomposition of CH4 over the freshly formed nanoparticles prevents their further growth, and thus results in a very high proportion of SWNTs and fewer MWNTs."
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