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How do the engines breathe in diesel submarines?
science.howstuffworks.com/transport/engines-equipment/question286.htm
How do the engines breathe in diesel submarines? Don't internal combustion engines need a lot of oxygen to run? Where would all of this oxygen come from when the sub is underwater?
How do the streetlights turn on automatically at night?
science.howstuffworks.com/environmental/energy/question363.htm
On the Flintstones, a small bird sits inside the light and turns it on every night before he goes to bed. In a modern streetlight, a small circuit replaces the bird.
How do they deice airplanes?
science.howstuffworks.com/deice-airplanes.htm
If you're traveling during the winter time, there's a good chance that your flight may be delayed because the plane needs deicing. Why do they wait until the last minute to do this?
How do they get the balls in ball bearings so perfectly round and smooth?
science.howstuffworks.com/transport/engines-equipment/question513.htm
Ball bearings can be found in a wide variety of machines and gadgets. If you take a look at one of them you may notice how perfectly smooth they feel and appear. How do they get like that? Find out how ball bearings are created in this article.
How do they measure sea level?
science.howstuffworks.com/environmental/earth/oceanography/question356.htm
How do they measure "sea level"? Is it the average of the tides? And is the sea level actually rising or not?
How do they start jet engines on airplanes?
science.howstuffworks.com/transport/flight/modern/question411.htm
How do you start a gas turbine engine? What is the mechanism to begin the rotation of the large fan blades?
How do torpedo engines work under water?
science.howstuffworks.com/transport/engines-equipment/question419.htm
Since a torpedo cannot have an air-breathing engine like a boat, how is it propelled through the water?
How do touch-sensitive lamps work?
science.howstuffworks.com/innovation/science-questions/touch-sensitive-lamp.htm
Touch-sensitive lamps is explored in this article from HowStuffWorks. Learn about touch-sensitive lamps.
How do trick birthday candles work?
science.howstuffworks.com/innovation/science-questions/question420.htm
How do trick birthday candles work -- the kind that re-light themselves after you blow them out?
How do we make decisions?
science.howstuffworks.com/life/inside-the-mind/human-brain/make-decisions.htm
Despite our best intentions, sometimes we just make bad choices. Is it possible to fight your own worst instincts? Only if you can spot these flaws in your decision making process.