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Kevlar - The Wonder Material
LBNL - KEVLAR I WONDER WHAT MAKES KEVLAR®* SO STRONG ?? Under water, Kevlar is 20 times stronger than steel. These Kevlar cables are supporting a sonar facility that the U.S. Navy uses to find out how much noise submarines make. Police wear bulletproof vests made of Kevl...
 Moving Electrons
American physicist named Joseph Henry was able to make an electromagnet that could lift more than a ton. Use your imagination: what could an electromagnet of this power be used for? How could it benefit people? Going further Make a compass from a dish of water, a cork, a needle, and a...
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American physicist named Joseph Henry was able to make an electromagnet that could lift more than a ton. Use your imagination: what could an electromagnet of this power be used for? How could it benefit people? Going further Make a compass from a dish of water, a cork, a needle, and a permanent magnet. Use the compass to locate magnets in items around the house, such as wrist watches; electrical appliances that are turned on; and iron or steel objects like lamps, food cans, or radiators.
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http://www.lbl.gov/MicroWorlds/teachers/movingelectrons.pdf#page=3
www.lbl.gov/MicroWorlds/teachers/movingelectrons.pdf#page=3
Advanced Light Source • Adventures in Light and Science Teacher Workshop • March 1996 Millions <span class="highlight">of</span> moving electrons + an iron core = The World’s Simplest Electromagnet What you need • a large <span class="highlight">steel</span> nail or bolt (i.e., containing iron) • some insulated electrical wire (about 25 cm) • a "D" size battery • batteries smaller than “D” size (optional) • two small pieces <span class="highlight">of</span> duct tape or a thick rubber band • any type <span class="highlight">of</span> permanent magnet such as a refrigerator magnet • different items that may
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http://www.lbl.gov/MicroWorlds/teachers/movingelectrons.pdf#page=6
www.lbl.gov/MicroWorlds/teachers/movingelectrons.pdf#page=6
American physicist named Joseph Henry was able to make an electromagnet that could lift more than a ton. Use your imagination: what could an electromagnet <span class="highlight">of</span> this power be used for? How could it benefit people? Going further Make a compass from a dish <span class="highlight">of</span> water, a cork, a needle, and a permanent magnet. Use the compass to locate magnets in items around the house, such as wrist watches; electrical appliances that are turned on; and iron or <span class="highlight">steel</span> objects like lamps, food cans, or radiators.
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