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How Does a GFCI Outlet Work?
home.howstuffworks.com/question117.htm
In my bathroom there is a plug that has a "Test" and a "Reset" button. When I push the "Test" button, it cuts off the current to the outlet. What is this? How is it different from the fuse in the fuse box?
How Does a Camera Obscura Device Work?
electronics.howstuffworks.com/question131.htm
A pinhole camera is the simplest camera possible. To get a better understanding of how they work, read more about camera obscura principles.
What Does the CE Certification Logo Mean?
electronics.howstuffworks.com/everyday-tech/question135.htm
Have you ever noticed the CE certification logo stamped on consumer products and electronics? Find out what this logo says about the product you're buying.
How does a frost-free refrigerator work?
home.howstuffworks.com/question144.htm
If you have an old refrigerator, you know about the frost that forms around the coils that cool the freezer. Learn how newer ones keep frost away.
How does a halogen light bulb work?
home.howstuffworks.com/question151.htm
A halogen light bulb is slightly different from a regular light bulb. Find out what makes a halogen light bulb different and how a halogen lamp works.
How does a Star Wars lightsaber work?
entertainment.howstuffworks.com/question171.htm
How do the lightsabers in the "Star Wars" movies work?
How Much Fuel Does an International Plane Use for a Trip?
science.howstuffworks.com/transport/flight/modern/question192.htm
Although the amount of fuel may seem high, when you do the math, it's actually not so bad.
What Is a Deep Cycle Battery, and How Does It Differ From a Standard One?
auto.howstuffworks.com/question219.htm
What is the difference between a normal lead-acid car battery and a "deep cycle" battery? I have a trolling motor on my boat and I don't see why I can't use my car's battery with it rather than spending another $80 on a deep cycle battery.
How do motion sensing lights and burglar alarms work?
home.howstuffworks.com/home-improvement/household-safety/question238.htm
How can motion-sensing lights detect your presence, and what prevents them from seeing you when you're standing still? It all comes down to the movement of light.
How Does a Fresnel Lens Work? The Magic Behind the Glass
science.howstuffworks.com/question244.htm
I have a thin piece of plastic mounted on the back window of my RV. It magnifies things so I can see better when I'm backing up. How can such a thin piece of plastic magnify things? A regular glass magnifying lens would have to be curved on both sides and much thicker.