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2. Audio frequency - Wikipedia

   en.wikipedia.org/wiki/Audio_frequency

   An audio frequency or audible frequency (AF) is a periodic vibration whose frequency is audible to the average human. The SI unit of frequency is the hertz (Hz). It is the property of sound that most determines pitch. [1] The generally accepted standard hearing range for humans is 20 to 20,000 Hz.

3. Crystal oscillator frequencies - Wikipedia

   en.wikipedia.org/wiki/Crystal_oscillator_frequencies

   Frequencies also used are 8.6436 MHz and 17.2872 MHz. 4.332 RDS: 3648× the RDS signal bit rate of 1187.5 bit/s. While the frequency of 4.332 MHz is the most commonly used crystal resonator, its multiples (2×4.332 MHz = 8.664 MHz or 4×4.332 MHz = 17.328 MHz) have been used also. 4.43361875 PAL/NTSC: PAL B/D/G/H/I and NTSC M4.43 color subcarrier.

4. Frequency - Wikipedia

   en.wikipedia.org/wiki/Frequency

   A pendulum with a period of 2.8 s and a frequency of 0.36 Hz. For cyclical phenomena such as oscillations, waves, or for examples of simple harmonic motion, the term frequency is defined as the number of cycles or repetitions per unit of time.

5. Fermi resonance - Wikipedia

   en.wikipedia.org/wiki/Fermi_resonance

   The calculated unperturbed frequency of 100 is 1337 cm −1, and, ignoring anharmonicity, the frequency of 02 0 0 is 1334 cm −1, twice the 667 cm −1 of 01 1 0. The states 02 0 0 and 100 can therefore mix, producing a splitting and also a significant increase in the intensity of the 02 0 0 transition, so that both the 02 0 0 and 100 ...

6. Pythagorean tuning - Wikipedia

   en.wikipedia.org/wiki/Pythagorean_tuning

   Comparison of equal-tempered (black) and Pythagorean (green) intervals showing the relationship between frequency ratio and the intervals' values, in cents. Pythagorean tuning is a system of musical tuning in which the frequency ratios of all intervals are determined by choosing a sequence of fifths [ 2 ] which are " pure " or perfect , with ...

7. 100,000 - Wikipedia

   en.wikipedia.org/wiki/100,000

   In astronomy, 100,000 metres, 100 kilometres, or 100 km (62 miles) is the altitude at which the Fédération Aéronautique Internationale (FAI) defines spaceflight to begin.

8. Scopolamine - Wikipedia

   en.wikipedia.org/wiki/Scopolamine

   Scopolamine, also known as hyoscine, [9] or Devil's Breath, [10] is a natural or synthetically produced tropane alkaloid and anticholinergic drug that is used as a medication to treat motion sickness [11] and postoperative nausea and vomiting.

9. Farad - Wikipedia

   en.wikipedia.org/wiki/Farad

   The farad (symbol: F) is the unit of electrical capacitance, the ability of a body to store an electrical charge, in the International System of Units (SI), equivalent to 1 coulomb per volt (C/V). [1]