tag:techtv.mit.edu,:Array/175883540 2008-01-17 14:39:44 -0500 professorblue <span>Do you know where your drinking water comes from? We will check it out in Professor Blue’s classroom.</span> 264 tag:techtv.mit.edu,:Array/175753120 2007-08-08 10:50:13 -0400 Lemelson-MIT Program Lemelson-MIT InvenTeams are teams of high school students, teachers, and mentors that receive grants up to $10,000 each to invent technological solutions to real-world problems. The InvenTeam initiative aims to excite high school students about invention through science, technology, engineering, and math; empower students to problem solve; and encourage an inventive culture in schools and communities.<br><br>The 2007 InvenTeams Odyssey was hosted at MIT by the Lemelson-MIT Program during June 20-22.<br><br>Visit http://web.mit.edu/inventeams/ for more information.<br><br>Music by Sbbrucey, available at http://www.sectionz.com. This video complies with the Creative Commons Attribution 2.5 license, viewable at http://creativecommons.org/licenses/by/2.5/ . 202 tag:techtv.mit.edu,:Array/175615360 2007-06-27 10:19:37 -0400 eng-youth MIT students build and operate the MIDAS automated dorm room. 167 tag:techtv.mit.edu,:Array/175551480 2007-06-27 10:10:47 -0400 eng-youth MIT students build a disco dance floor from scratch. 151 tag:techtv.mit.edu,:Array/175508400 2007-08-08 10:41:27 -0400 Lemelson-MIT Program Lemelson-MIT InvenTeams are teams of high school students, teachers, and mentors that receive grants up to $10,000 each to invent technological solutions to real-world problems. The InvenTeam initiative aims to excite high school students about invention through science, technology, engineering, and math; empower students to problem solve; and encourage an inventive culture in schools and communities.<br><br>The 2007 InvenTeams Odyssey was hosted at MIT by the Lemelson-MIT Program during June 20-22.<br><br>Visit http://web.mit.edu/inventeams/ for more information.<br><br>Music by STE316, available at http://www.sectionz.com. This video complies with the Creative Commons Attribution 2.5 license, viewable at http://creativecommons.org/licenses/by/2.5/ . 142 tag:techtv.mit.edu,:Array/175415700 2008-08-27 16:48:12 -0400 MIT Department of Physics Technical Services Group <p>A bicycle wheel is suspended from one of end of its axie by a rope, and spun up by hand. The wheel's axle is then placed horizontally and the free end of the axle processes about the supported end. </p><p>The gyroscope seems to defy gravity because the torque created by the spinning wheel counteracts the torque due to gravity. Read more about gyroscopes <a href="http://en.wikipedia.org/wiki/Gyroscope">here</a>. Gyroscopes have been used through history for varied uses such as stabilizing spacecraft or for guidance systems on ships and missiles.</p> 89 tag:techtv.mit.edu,:Array/175367880 2008-06-20 15:47:45 -0400 MIT Department of Physics Technical Services Group <p>A small glass tube, held by copper wire, is placed in series with a light bulb. The glass acts as an insulator at room temperature, meaning the current cannot flow between the copper wires. This leaves an open circuit and the light bulb does not light up. Touching a conductor across the copper wires (with a metal screwdriver for instance) does complete the circuit because it allows current to flow.</p><p>However, when glass is sufficiently heated by a torch it becomes an ionic conductor. Ionic bonds in the glass are broken, allowing the charge carrying ions to move freely. Thus, when the glass is melted the current can flow, which closes the circuit and lights the bulb. </p> 72 tag:techtv.mit.edu,:Array/175333540 2008-06-06 11:36:25 -0400 MIT Department of Physics Technical Services Group An RF transmitter is connected to a long antenna, emitting radio waves. A dipole antenna with a light bulb between its elements acts as the receiver. When the receiving antenna is parallel to the transmitter, the radio waves are absorbed, creating a current in the antenna and causing the bulb to glow. When perpendicular, no current is created, and the bulb does not glow. 57 tag:techtv.mit.edu,:Array/175293840 2008-06-20 16:53:07 -0400 MIT Department of Physics Technical Services Group <p>A light bulb is placed in series with two copper plates immersed in de-ionized water. Touching the plates closes the circuit, lighting the bulb.</p><p>When kosher salt is dropped into the de-ionized water, the salt dissolves, causing ions to be dispersed throughout the liquid. The free ions allow current to flow through the water, which completes the circuit and lights the bulb.</p><p>Most water we encounter in everyday life is not de-ionized and contains impurities with dissolved ions. This is why we know water as a good conductor, and why we shouldn't use electronic devices around a bathtub, for example.</p> 54 tag:techtv.mit.edu,:Array/175244760 2008-01-16 14:55:18 -0500 professorblue <p>Hey kids - see Professor Blue run through a forest and jump down a well, in mad pursuit of science. </p><p>See how limber Professor Blue is (thirsty too). Show your friends. Impress your teachers. Only for kids 5 - 110 though. Everyone else ... watch out!</p><p>Warning: may be habit forming. </p> 37