You can make an airfoil using a piece of notebook paper and a book. Place the paper between two pages of the book, leaving one end of paper hanging out. Close the book. When you direct air over the top of the paper, it rises upward, illustrating lift.
Move air over your airfoil by blowing on it or by moving the book quickly through the air. Either way, you see the paper rise. This is due to the shape of the airfoil. This airfoil is simple, but it uses the same principles employed in making airplane wings and propellers.
When air is in motion, some passes over the top of the airfoil, and some passes under the bottom. Because of its shape, as air passes above and below an airfoil, the air at the top speeds up, which decreases the air pressure in that area. The air below maintains a constant speed, and so has a higher pressure. This pressure differential illustrates Bernoulli's principle. As air moves more quickly, there is a greater difference in air pressure. When the differential is high enough, lift is achieved, and the piece of notebook paper ? or the wing of an airplane ? rises into the air.Learn More
A brony is an adult male fan of the television show "My Little Pony: Friendship is Magic." Some adult female fans of the show also refer to themselves as bronies, though the more common term for these fans is "pegasister."Full Answer >
Jimmy Neutron action figures are character figurines based on the popular Nickelodeon cartoon, "The Adventures of Jimmy Neutron: Boy Genius." The action figures are usually marketed to young boys, but have garnered an increased popularity with adult collectors.Full Answer >
A dinosaur Pillow Pet is a plush toy with the appearance of a dinosaur that looks like a normal stuffed plush toy but can also be unfolded to serve as a pillow. Several dinosaur type Pillow Pets are available, including the Blue Dinosaur, Green Dinosaur, Pterodactyl and Rexy-Rex.Full Answer >
Clackers, also known as Klackers, Knockers, Click-Clacks, Clappers, Clacker Balls and Ker-bangers, can be purchased online at places like Amazon, Party City, Etsy and eBay. Clackers come in a variety of forms: as two balls attached by a string, as two balls on a triangular frame with a handle and as noisemakers in a multitude of shapes and sizes.Full Answer >