What Makes a Boomerang Come Back?
It is the built-in skew or twist in a boomerang combined with its spinning motion that makes it return to the thrower. At first people belie
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How Do Birds Fly?
Most birds are well suited for flying. First of all, a bird has feathers and wings, and powerful muscles in its breast with which to flap th
How Do Sailboats Sail into the Wind?
How Do Sailboats Sail into the Wind? Sailboats cannot sail directly into the wind. They can, however, sail upwind by following a zigzag cour
How Do Frisbees Fly?
How Do Frisbees Fly? When a Frisbee soars through the air, its spinning motion is what keeps it flying. Operating on the principle of an air