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A tuning fork is an acoustic resonator in the form of a two-pronged fork with the prongs formed from a U-shaped bar of elastic metal (usually steel). It resonates at a specific constant pitch when set vibrating by striking it against a surface or with an object, and emits a pure musical tone once the high overtones fade out.
An impossible trident, [1] also known as an impossible fork, [2] blivet, [3] poiuyt, or devil's tuning fork, [4] is a drawing of an impossible object (undecipherable figure), a kind of an optical illusion. It appears to have three cylindrical prongs at one end which then mysteriously transform into two rectangular prongs at the other end.
The terms tine and prong are mostly interchangeable. A tooth of a comb is a tine. The term is also used on musical instruments such as the Jew's harp, tuning fork, guitaret, electric piano, music box or mbira (kalimba) which contain long protruding metal spikes ("tines") which are plucked to produce notes.
Experiment using two tuning forks oscillating at the same frequency.One of the forks is being hit with a rubberized mallet. Although the first tuning fork hasn't been hit, the other fork is visibly excited due to the oscillation caused by the periodic change in the pressure and density of the air by hitting the other fork, creating an acoustic resonance between the forks.
From January 2008 to December 2012, if you bought shares in companies when Christine A. Poon joined the board, and sold them when she left, you would have a -42.7 percent return on your investment, compared to a -2.8 percent return from the S&P 500.
The College Football Playoff championship game is set. Notre Dame and Ohio State will meet for the national title. A look at three keys to the game.
The Oak Cliff, Texas, native has shown an ability to keep plays alive with his feet, either moving around inside and outside the pocket while waiting for a receiver to get open or going on his own ...
Detroit Lions coach Dan Campbell brings intensity to every game. As for Sunday night's matchup between the Lions and Minnesota Vikings, which will determine the No. 1 seed in the NFC, Campbell ...