Search Results | metal detectors
Your search for "metal detectors" returned 113 results
Does tinfoil on your hubcaps bypass police radar?
Metal is super reflective, but it might not reflect a stop by the police. Learn if tinfoil on your hubcaps helps bypass police radar at HowStuffWorks.
How Burglar Alarms Work
home.howstuffworks.com/home-improvement/household-safety/burglar-alarm.htm
Burglar alarms are found in every retail store and are becoming more common in private homes. Find out how a simple burglar alarm system works.
What's the difference between backscatter machines and millimeter wave scanners?
science.howstuffworks.com/backscatter-machines-vs-millimeter-wave-scanners.htm
Nope, these advanced imaging technologies are not the same. So whether you're concerned about privacy, safety or time as you're shuffling through the airport security line, we can tell you how these two types of scanners stack up against each other.
Top 10 Smartest Animals in the World
animals.howstuffworks.com/animal-facts/10-smartest-animals.htm
Humans aren't the only animals that can count, use logic, make tools or form lasting bonds with others. Meet 10 of the smartest animals in the world.
How Gold Works
science.howstuffworks.com/gold.htm
We love it. We wear it glittering around our necks and sparkling at our ears, wrists and feet. We pass it down to our children and hoard it in secret stashes. Why is this precious metal so prized?
How Crayons Work
entertainment.howstuffworks.com/arts/artwork/crayons.htm
Crayons are steeped in the artwork of our childhoods. How did these popular little sticks of color actually come about? Find out from HowStuffWorks.
How Radon Works
home.howstuffworks.com/home-improvement/household-safety/radon.htm
In places where uranium is common in the soil, radon is a popular topic of discussion. Even though radon is "completely natural," it can be a real health hazard. Learn how radon forms and why it is so dangerous.
10 Weirdest Things Spotted by the TSA
people.howstuffworks.com/10-weirdest-things-spotted-tsa.htm
TSA officials have spotted some really strange things at airport security checkpoints. Here are 10 of the weirdest from HowStuffWorks.
How 'The Da Vinci Code' Doesn't Work
entertainment.howstuffworks.com/davinci-code.htm
Learn what happened when we took a close, hard look at 'The Da Vinci Code' and how it uses science, technology, art and history.
How does the ball return work on a coin-operated pool table?
electronics.howstuffworks.com/question495.htm
How does the ball return work on a coin-operated pool table? If I hit one of the numbered balls into a pocket, the ball goes into a locked storage compartment. If I hit the cue ball into a pocket, the table returns it. How does the pool table tell the difference between the two types of balls?