High Tech High Exhibition Night 2008 Pt 1 Mainly, we built some Live Aid which was a concert to benefit people with AIDS and people in Africa. The idea for Live Aid was from a man named Bob Geldof, and he was a recording artist. He thought it would be a great idea to unite all these popular recording artists for this great cause, like Madonna, U2, Elton John, David Bowie. And they raised, I think about $31 million on the first one. And from that came a series of concerts like comedy, aid, Farm Aid, Live Aid, which also had similar performance but different concers. [CROSSTALK] Concentrate on having rubberband [INAUDIBLE]. [CROSSTALK] Do you feel a temperature change? Yes! [CROSSTALK] A genome is the full set of genes in the living organism. In a human body there are 49 genes, 49 plus one male or female gene. [INAUDIBLE] [MUSIC] [CROSSTALK] The Darfur genocide is something that is happening in western Sudan where the government is supporting a militia group called the Janjaweed. But even though that people know about it, the government still denies it. As the sand falls through our hourglass, this represents how many [INAUDIBLE]. [CROSSTALK] [NOISE] What have we got here? We've have a threaded rod. The threaded rod spins inside these nuts, moving them side to side. It's a very novel concept spinning the rods instead of the nuts. We have two motors. One spins the gears, and one spins the rod. I know. What we're going to do is we're going to turn it on, and hopefully, erase all the marker. We're going to turn on these, and turn on this one. Now it's incredibly slow, so at this point, you might want to time lapse it. You always want to have pressure on the bar or else it won't clean anything. That's why we chose the threaded rod concept. It may be slow, but it's very stable and the battery is running out, I'm going to turn it off. But look at that. It's almost all gone! It's all gone! [MUSIC] Find it within a couple nights of having the project assigned. [INAUDIBLE] This is supposed to represent the 1792 era machine from the French Revolution. We added a couple things like these suppors for stability and these rings [INAUDIBLE]. Add those features until 1872, right? Yeah. The chemistry behind gunpowder is really simple. You have charcoal which is what burns during the reaction and creates most of the gasses and then you have potassium nitrate which supplies the oxygen because by itself, carbon does not burn. But to get those two to burn, you need a really high temperature to start it. The sulfur which is flammable by itself is added to the mixture to greatly reduce the ignition temperature. Her head's in the biology room, and then put all the blood splatter [INAUDIBLE] analysis of blood spatter trajectory and probability. [NOISE] That can be recycled, these bottles are recyclables. Okay. We developed them using the stuff over there, and then we calculated the distance using which is really fun actually. And we calculated angles using something called a tangent, which is a way to find the size and angles. Any questions? [MUSIC]