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Do commercial jets have locks on the doors and ignition keys?
science.howstuffworks.com/transport/flight/modern/question311.htm
Do commercial jets have locks on the doors and ignition keys? If not, what keeps someone from stealing them?
How does copy protection on a video tape work?
electronics.howstuffworks.com/question313.htm
How do VHS tapes prevent you from bootlegging a copy of a movie? Find out how Macrovision works.
How does the toilet in a commercial airliner work?
science.howstuffworks.com/transport/flight/modern/question314.htm
When flushing the toilet in a passenger airplane, I'm amazed by the huge noise it makes -- like a powerful vacuum cleaner. Can you explain what makes this noise?
What is carrageenan?
recipes.howstuffworks.com/question315.htm
I notice that most foods I eat have normal-sounding ingredients except one -- this stuff called "carrageenan." What is carrageenan?
How does a hydraulic ram pump work?
science.howstuffworks.com/transport/engines-equipment/question318.htm
When I was a kid, my Aunt had constantly flowing water from a natural spring down the hill. She said the water was pumped uphill using a hydraulic ram. This device ran constantly and didn't need any electricity! What is a hydraulic ram and how does it work?
Why does my computer need a battery?
computer.howstuffworks.com/question319.htm
I have an older computer, and when I turned it on yesterday it would not boot. When I called technical support, they told me I needed a new battery. Why does a computer need a battery? Doesn't it get all of its power from the plug in the wall?
Why is the back of a refrigerator painted black?
home.howstuffworks.com/question32.htm
Why is the back of a refrigerator painted black? It has nothing to do with visual preference. Find out why the back of your fridge might be black.
What does 900 MHz mean in a cordless phone?
electronics.howstuffworks.com/question320.htm
I've been looking at cordless phones and have noticed that this area has gotten fairly complicated! For example, what is the difference between 900 MHz and other systems?
What exactly is a blueprint?
science.howstuffworks.com/engineering/architecture/question321.htm
If you've ever seen a construction site, you may have noticed that the general plans for construction are drawn out in the form of blueprints. What exactly are blueprints, though, and how are they made? Find out in this article.
Silk Screen Printing: From Fabric to Fine Art
science.howstuffworks.com/innovation/science-questions/question322.htm
I'm having T-shirts printed, and the people at the shop keep talking about "silk-screening." How does silk-screening work?