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Inside a Tennis Ball Launcher
electronics.howstuffworks.com/gadgets/other-gadgets/tennis-ball-launcher-pictures.htm
Tennis ball launchers can help you practice your swing, but how do they work? See these inside a tennis ball launcher pictures to find out.
How WWII Fighter Planes Worked
science.howstuffworks.com/wwii-plane.htm
The film "Pearl Harbor" is now playing. Look at the aircraft involved in that battle, technological marvels for their time.
How Sci-fi Doesn't Work
entertainment.howstuffworks.com/sci-fi.htm
Learn how sci-fi doesn't work in some popular movies and TV shows.
Start of World War II: September 1939-March 1940
history.howstuffworks.com/world-war-ii/start-world-war-2.htm
This World War II timeline highlights important dates from September 1939 to April 1940. Follow the events of World War II and the German invasion.
Can We Guess If You Were a Nick or Disney Kid?
play.howstuffworks.com/quiz/can-we-guess-if-you-were-a-nick-or-disney-kid
Given the option, would you take a sponge who wears pants or a teen spy ready to save the world between lunch and fifth period? Tell us your faves, and we'll tell you where your loyalties lie.
How Energy-efficient Electronics Work
electronics.howstuffworks.com/everyday-tech/energy-efficient-electronics.htm
Energy-efficient electronics can help you save money by using less electricity. Learn more about different types of energy-efficient electronics.
How Stirling Engines Work
auto.howstuffworks.com/stirling-engine.htm
The Stirling engine is a heat engine that is vastly different from the internal-combustion engine in your car. It has the potential to be more efficient than most types of engines, but it hasn't made it into mass production yet. Find out why.
How Fire Works
science.howstuffworks.com/environmental/earth/geophysics/fire.htm
Few things have done as much harm to humanity as fire, and few things have done as much good. Find out where fire comes from and see why it behaves the way it does. The answers might surprise you!
How Ramjets Work
science.howstuffworks.com/transport/engines-equipment/ramjet.htm
Imagine whipping through the sky at thousands of miles per hour. This special type of jet engine can do exactly that.
How Waterslides Work
science.howstuffworks.com/engineering/structural/water-slide.htm
It's a leap of faith onto a curvy, steep, wet chute... Discover how the principles of physics are at work on with water slides.