Search Results | metal detectors
Your search for "metal detectors" returned 104 results
How Metal Detectors Work
electronics.howstuffworks.com/gadgets/other-gadgets/metal-detector.htm
Metal detectors can help you find metal buried deep in the ground. Find out how metal detectors work and learn about the different types of metal detectors.
How Lie Detectors Work
people.howstuffworks.com/lie-detector.htm
Lie detection is a consistently controversial topic -- how can a machine tell truth from deception? Does everyone have the same physiological reaction when telling a lie? If so, how can some people "beat the box"? Find out what these devices measure and if they really can detect lies.
How Carbon Monoxide Detectors Work
home.howstuffworks.com/home-improvement/household-safety/carbon-monoxide-detector.htm
Carbon monoxide detectors help protect your family from deadly carbon monoxide gas. Find out how carbon monoxide detectors sense dangerous molecules.
How Airport Security Works
science.howstuffworks.com/transport/flight/modern/airport-security.htm
According to the Department of Homeland Security 730 million people travel on passenger jets every year. Are these folks safe? Find out how high-tech solutions are being used to make flying as safe as possible.
How An Oscillator Works
electronics.howstuffworks.com/oscillator.htm
Oscillators show up in lots of electronic equipment. In fact, you might be surprised to know that computers, radios, metal detectors, and stun guns all use oscillators. Read on to learn how an oscillator works!
Hotel Security Experts Warn About Learning the Wrong Lessons in Wake of Las Vegas Shooting
people.howstuffworks.com/hotel-security-experts-warn-wrong-lessons-in-wake-las-vegas-shooting.htm
The Las Vegas music festival massacre has made Americans think more about hotel security. HowStuffWorks talks to experts about what should be done.
Determining the Worst School Shooting by Fatalities
people.howstuffworks.com/worst-school-shooting.htm
There are unfortunately myriad ways to classify the worst school shooting: the most shocking, the most emotionally devastating, the most preventable. Here, we offer historical context around the deadliest school shootings.
How Millimeter Wave Scanners Work
science.howstuffworks.com/millimeter-wave-scanner.htm
If you've traveled recently, you probably raised your arms above your head and waited for a millimeter wave scanner to do its screening thing. During those 10 seconds or so, did you ever wonder exactly how the device produced your image?
How much gold is there in the world?
money.howstuffworks.com/question213.htm
I recall hearing once that all of the world's gold could be formed into a cube measuring 18 feet by 18 feet on a side, or something like that. Is that true? If so, how much would it weigh and how much would it be worth?
How Parking Garages Track Open Spaces, and Why They Often Get It Wrong
HowStuffWorks looks at the inexact science of keeping count in a parking garage.