Search results
Results from the WOW.Com Content Network
The wagon-wheel effect (alternatively called stagecoach-wheel effect) is an optical illusion in which a spoked wheel appears to rotate differently from its true rotation. The wheel can appear to rotate more slowly than the true rotation, it can appear stationary, or it can appear to rotate in the opposite direction from the true rotation ...
There are two bushings per truck, one above and one below where the hanger fits onto the kingpin. These are sometimes called the boardside and roadside bushing, respectively. Like wheels, bushings are available with different levels of hardness. The kingpin nut may be tightened or loosened to adjust the turning radius and response of the truck ...
A G-Turn is a Nose Manual, but without facing the riding direction. The rider increases speed, then places the front foot on the nose while keeping the back foot over the back wheels. While riding, the board tends to turn frontside or backside, ending with a spin. Variations: One-Wheeled, Backward, Hang Ten (two feet on the nose)
They can be read right side up or upside down, or both. Rotation ambigrams are the most common type of ambigrams for good reason. When a word is turned upside down, the top halves of the letters turn into the bottom halves. And because our eyes pay attention primarily to the top halves of letters when we read, that means that you can ...
A roller coaster inversion is a roller coaster element in which the track turns riders upside-down and then returns them to an upright position. Early forms of inversions were circular in nature and date back to 1848 on the Centrifugal railway in Paris.
If spun in the opposite direction, it becomes unstable, "rattles" to a stop and reverses its spin to the preferred direction. For most rattlebacks the motion will happen when the rattleback is spun in one direction, but not when spun in the other. Some exceptional rattlebacks will reverse when spun in either direction. [1]
Penguin books in Australia recently had to reprint 7,000 copies of a now-collectible book because one of the recipes called for "salt and freshly ground black people." 9 misprints that are worth a ...
The Magnus effect is a phenomenon that occurs when a spinning object is moving through a fluid. A lift force acts on the spinning object and its path may be deflected in a manner not present when it is not spinning. The strength and direction of the Magnus effect is dependent on the speed and direction of the rotation of the object.