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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.
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.
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.
A variable flux density circulates between the two prongs and some dynamic magnetic forces appear between the two prongs at twice the supply frequency. When the exciting force frequency matches the fundamental mode of the tuning fork close to 400 Hz, a strong acoustic resonance occurs.
Cowlick vs. Balding: Key Differences. A cowlick differs from a bald spot in a couple key ways.. First, a cowlick is a natural, normal feature of your scalp that occurs as a result of your genes.
The Blivet, also known as the Devil's tuning fork, an impossible object and optical illusion Bidens frondosa , an herb native to North America The Twin lead of TV antennas, as well as video game RF switches.
Some of President-elect Donald Trump’s most vulnerable Cabinet picks are racing to smooth out or overwrite past statements before contentious Senate confirmation fights.
January forecast trends colder in the Northeast, but milder in the Northwest. Notice how the outlook for January looks a bit different in the northern tier compared to what the overall picture for ...
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