alpha-Centauri: Videothek 2006 | alpha-Centauri | BR-alpha | BR Gibt es Außerirdische? Wie dünn war die Ursuppe? Und wie sieht eigentlich die Zukunft des Universums aus? Manchmal wissen nur Experten wie der Astrophysiker Harald Lesch weiter. Harald Lesch Geschichtenerzählen und Astrophysik - das sind seine beiden großen Leidenschaften: Dr. 6 Mind-Blowing Substances That Laugh in the Face of Physics We can laugh at our ancestors who thought gunpowder was sorcery, or rappers who don't understand what magnets are. But we're telling you right now, there are materials created by science that absolutely look like fucking witchcraft. These materials are often hard to get and/or incredibly dangerous, but they're worth it for the cool factor alone. #6. Gallium, the Metal That Melts in Your Hand Gajitz Sure, everybody knows there's such a thing as liquid metal (mercury, duh) and that all metal will melt if you get it hot enough. Gallium melts at just past room temperature, so it isn't very useful for building anything, unless that thing is intended to be both short-lived and hilarious. Disappearing SpoonsThere is no spoon. Wait, it gets weirder. Just dab a little drop on the top of a can ... Nurd Rage ... and it will make the entire area around it brittle. Nurd Rage"Now you can open beer cans with the same ease of gouging out the eyes of those who would defy you!" #5. #4. Ultra Tech Media
Free video lectures,Free Animations, Free Lecture Notes, Free Online Tests, Free Lecture Presentations 15 Awesome Chemistry GIFs You don’t need to watch Breaking Bad to know that chemistry is pretty awesome. Below, we explore our favorite 15 chemistry GIFs and the science behind them (when we could figure it out): Melting Metal With Magnets The Science: The copper wire has a significant amount of AC electricity running through it, causing it to act like a really strong electromagnet. In the metal slug, eddy currents form due to the magnetic field the copper wire is causing while the copper wire has high frequency AC flowing through it. The metal slug’s electric resistance causes a portion of the electric energy to turn into heat, but the heat builds up until the metal slug becomes white hot and melts. Orange LED Light In Liquid Nitrogen The Science: When an LED is immersed in liquid nitrogen, the electrons lose a lot of thermal energy, even when the light isn’t turned on. Awesome Chemistry GIFs: Heating Mercury Thiocyanate Hydrogen Peroxide Catalyzed By Potassium Iodide