Now bracing for category-4 mayhem means simply pulling down your shades. Storm-A-Rest manufacturer JHRG managed to turn a few pounds of .025-inch-thick fabric into stronger storm protection for windows than plywood. Faced with two-by-fours shot at 34 mph from an air cannon (one of the tests for category-4 certification in Florida), Storm-A-Rest panels survived undamaged; the boards punched right through plywood.
"John was always into the military," says Brian Hart. He and his wife, Alma, were hoping their son would go to college, "but when 9/11 happened, he was sure," Hart recalls. "He wanted to serve." John enlisted in September 2002 at age 19, drawing a place in the 173rd Airborne Brigade. By July, he was on the front line in Iraq and quickly realized that the Army had come to war unprepared. "He called me and said, 'Dad, we need body armor. Can you help?'" The next week, October 18, 2003, John and his commanding officer were killed in their unarmored humvee during a roadside ambush.
The ice coating is just for effect. Heat from air resistance would melt any ice on planes in-flight.
The South Korean air force showcased its new aircraft testing and evaluation center on opening day, September 8, by coating this F-4 Phantom fighter jet with ice. In the facility, engineers simulate conditions that a plane might encounter at 40,000 feet to determine if the craft's composite structure—particularly in its wings—can endure the freezing temperatures without cracking.
"John was always into the military," says Brian Hart. He and his wife, Alma, were hoping their son would go to college, "but when 9/11 happened, he was sure," Hart recalls. "He wanted to serve." John enlisted in September 2002 at age 19, drawing a place in the 173rd Airborne Brigade. By July, he was on the front line in Iraq and quickly realized that the Army had come to war unprepared. "He called me and said, 'Dad, we need body armor.
All the components of glass can be found in two places: the beach and the laundry room. It's possible to melt pure white-silica beach sand into glass, but only at temperatures of 3,000 to 3,500°F. Washing soda, lime or borax (a traditional laundry aid) added to the sand disrupts the quartz-crystal structure of silica and reduces the required temperature to a more practical, though still dangerous, 2,000°F, which I achieved with a backyard grill and a vacuum cleaner.
Three of the latest uses for everyone's favorite beam, including making lightning and jump-starting reactors
By Graeme Stemp-MorlockPosted 11.11.2008 at 12:41 pm 3 Comments
Lasers are the key to a new "breathalyzer" for cancer and diabetes, say University of Colorado scientists. Exhale into the device, and molecules in your breath that could indicate disease absorb rays of laser light. A computer diagnoses you by matching the absorption patterns to a library of chemical "fingerprints." The next step is to expand the library, with hopes of selling the device in 10 years.
So you've lost your eyeglass case. Yes, again. Gets frustrating, doesn't it? Stop wasting time searching for stuff -- build a device that emits signals you can see and hear, so you can find what you're looking for instantly. Attach remote-control car receivers to any items you frequently misplace, and put the cars' transmitters in a control box that can activate the receivers' lights and sound signals. Then when one of the items goes missing, press the corresponding button on the box, and you'll have it back in no time. Or at least until the next time you need it.