To help compare different orders of magnitude, the following list describes various frequencies. An order of magnitude is the class of scale or magnitude of any amount, where each class contains values of a fixed ratio to the class preceding it. ... Categories: Orders of magnitude (area) ... This is a list of orders of magnitude for data (or information), measured in bits. ... External links Conversion Calculator for Units of Density Categories: Orders of magnitude (density) | Orders of magnitude ... Categories: Orders of magnitude (length) | Length ... Categories: Orders of magnitude (mass) ... This list compares various sizes of positive numbers, including counts of things, dimensionless numbers and probabilities. ... This page lists examples of the power in watts produced by various different sources of energy. ... This is a table of specific heat capacities by magnitude. ... To help compare different orders of magnitude, the following list describes various speed levels between 10−9 m/s and 3 × 108 m/s. ... Categories: Orders of magnitude (temperature) ... The pages linked in the right-hand column contain lists of times that are of the same order of magnitude (power of ten). ... The pages linked in the right-hand column contain lists of volumes that are of the same order of magnitude (power of ten). ... This article lists conversion factors between a number of units of measurement. ... The definition, agreement and practical use of units of measurement have played a crucial role in human endeavour from early ages up to this day. ... The International System of Units (abbreviated SI from the French phrase, Système International dUnités) is the most widely used system of units. ... The SI system of units defines seven SI base units: fundamental physical units defined by an operational definition. ... SI derived units are part of the SI system of measurement units and are derived from the seven SI base units. ... An SI prefix is a prefix that can be applied to an SI unit to form a decimal multiple or submultiple. ... In physics, Planck units are physical units of measurement originally proposed by Max Planck. ... An order of magnitude is the class of scale or magnitude of any amount, where each class contains values of a fixed ratio to the class preceding it. ... Sine waves of various frequencies; the lower waves have higher frequencies than those above. ...

Examples

• 10 Hz, cyclic rate of a typical automobile engine at idle (equivalent to 600 rpm)
• 50 Hz or 60 Hz (50 Hz for European AC, Tokyo AC or 60 Hz for American AC, Osaka AC), electromagnetic — standard AC mains power
• 20 Hz to ~16 kHz, acoustic — normal range of adult human hearing (most children and some animals perceive sounds outside this range)
• 100 Hz, cyclic rate of a typical automobile engine at redline (equivalent to 6000 rpm)
• 261.626 Hz, acoustic — the musical note middle C
• 440 Hz, acoustic — concert pitch (A above middle C), used for tuning musical instruments
• 530 kHz to 1.710 MHz, electromagnetic — AM radio broadcasts
• 740 kHz, transitions — the clock speed of the world's first commercial microprocessor, the Intel 4004 (1971)
• 1 MHz to 8 MHz, transitions — clock speeds of early home/personal computers (mid-1970s to mid-1980s)
• 42 MHz to 260 MHz, electromagnetic — VHF terrestrial TV broadcast channels
• 88 MHz to 108 MHz, electromagnetic — FM radio broadcasts
• 1420 MHz, the frequency of the hyperfine transition of hydrogen, the most common element in the universe.
• 3.73 GHz, transitions — clock speed of the Pentium 4 "Prescott" microprocessor (2005)
• 428 THz to 750 THz, electromagnetic — visible light, from red to violet
• 30 PHz, electromagnetic — x-rays

For the Rise Against album, see Revolutions Per Minute (album). ... Electromagnetism is the physics of the electromagnetic field: a field, encompassing all of space, composed of the electric field and the magnetic field. ... It has been suggested that Electric reactance be merged into this article or section. ... Type F Mains power plug & socket The term mains usually refers to the general purpose AC electrical power supply (as in Ive connected the appliance to the mains). The term is not usually used in the US and Canada, where it is known as household, or domestic power. ... Transmission lines in Lund, Sweden Electric power, often known as power or electricity, involves the production and delivery of electrical energy in sufficient quantities to operate domestic appliances, office equipment, industrial machinery and provide sufficient energy for both domestic and commercial lighting, heating, cooking and industrial processes. ... Acoustics is a branch of physics and is the study of sound, mechanical waves in gases, liquids, and solids. ... Redline refers to the maximum speed at which an internal combustion engine and its components are designed to operate without causing damage to the components themselves or other parts of the engine. ... rpm or RPM may mean: revolutions per minute RPM Package Manager (originally called Red Hat Package Manager) RPM (movie) RPM (band), a Brazilian rock band RPM (magazine), a former Canadian music industry magazine In firearms, Rounds Per Minute: how many shots an automatic weapon can fire in one minute On... In music, the term middle C refers to the note C located between the staves of the grand staff, quoted as C4 in note-octave form. ... In music, pitch is the perception of the frequency of a note. ... Mediumwave radio transmissions (sometimes called Medium frequency or MF) are those between the frequencies of 300 kHz and 3000 kHz. ... In synchronous digital electronics, such as most computers, a clock signal is a signal used to coordinate the actions of two or more circuits. ... Microprocessors, including an Intel 80486DX2 and an Intel 80386 A microssor (abbreviated as µP or uP) is a computer electronic component made from miniaturized transistors and other circuit elements on a single semiconductor integrated circuit (IC) (aka microchip or just chip). ... The Intel 4004, a 4-bit CPU, was the worlds first single-chip microprocessor, as well as the first commercial one. ... 1971 is a common year starting on Friday (click for link to calendar). ... The home computer is a consumer-friendly word for the second generation of microcomputers (the technical term that was previously used), entering the market in 1977 and becoming common during the 1980s. ... This article provides extensive lists of events and significant personalities of the 1970s. ... 1980 is a leap year starting on Tuesday. ... Very high frequency (VHF) is the radio frequency range from 30 MHz (wavelength 10 m) to 300 MHz (wavelength 1 m). ... Terrestrial television (also known as over-the-air or OTA) is the traditional method of television broadcast signal delivery, by radio waves transmitted through open space. ... VHF North and South America United Kingdom Republic of Ireland Western Europe France French overseas departments and territories Italy Eastern Europe Morocco Australia New Zealand Japan Peoples Republic of China Republic of China (Taiwan) Indonesia South Africa Angola Côte dIvoire UHF North and South America United Kingdom... FM radio is a broadcast technology invented by Edwin Howard Armstrong that uses frequency modulation to provide high-fidelity broadcast radio sound. ... In atomic physics, hyperfine structure is a small perturbation in the energy levels (or spectrum) of atoms or molecules due to the magnetic dipole-dipole interaction, arrising from the interaction of the nuclear magnetic dipole with the magnetic field of the electron. ... Pentium 4 (with hyper-threading) brand logo The Pentium 4 is a seventh-generation x86 architecture microprocessor produced by Intel and is their first all-new CPU design, called the NetBurst architecture, since the Pentium Pro of 1995. ... 2005 is a common year starting on Saturday of the Gregorian calendar. ... The optical spectrum (light or visible spectrum) is the portion of the electromagnetic spectrum that is visible to the human eye. ... Prism splitting light Light is electromagnetic radiation with a wavelength that is visible to the eye (visible light) or, in a technical or scientific setting, electromagnetic radiation of any wavelength. ... Red is a color at the lowest frequencies of light discernible by the human eye. ... Violet (named after the flower violet) refers to any of a group of reddish blue or bluish purple colors. ... In the NATO phonetic alphabet, X-ray represents the letter X. An X-ray picture (radiograph) taken by Röntgen An X-ray is a form of electromagnetic radiation with a wavelength approximately in the range of 5 pm to 10 nanometers (corresponding to frequencies in the range 30 PHz...

Lower frequencies

• Once per minute (one rpm): about 16.667 mHz
• Hourly: about 277.8 µHz
• Daily: about 11.57 µHz
• Weekly: about 1.653 µHz
• Monthly (on average): about 380.5 nHz
• Yearly: about 31.71 nHz
• Once per decade: about 3.171 nHz
• Once per generation: about 1 nHz
• Once per century: about 317.1 pHz
• Once per millennium: about 31.71 pHz

rpm or RPM may mean: revolutions per minute RPM Package Manager (originally called Red Hat Package Manager) RPM (movie) RPM (band), a Brazilian rock band RPM (magazine), a former Canadian music industry magazine In firearms, Rounds Per Minute: how many shots an automatic weapon can fire in one minute On...

Radio spectrum

Radio frequency, or RF, refers to that portion of the electromagnetic spectrum in which electromagnetic waves can be generated by alternating current fed to an antenna. ... Extremely low frequency (ELF) is the band of radio frequencies from 3 to 300 Hz. ... Super Low Frequency (SLF) is the frequency range between 30 Hertz and 300 Hertz. ... Ultra Low Frequency (ULF) is the frequency range between 300 Hertz and 3000 Hertz. ... A voice frequency (VF) or voice band is one of the frequencies, within part of the audio range, that is used for the transmission of speech. ... Very low frequency or VLF refers to radio frequencies (RF) in the range of 3 to 30 kHz. ... Low Frequency or LF (sometimes called longwave) refers to Radio Frequencies (RF) in the range of 30-300 kHz. ... Longwave radio frequencies are those below 500 kHz, which correspond to wavelengths longer than 600 meters. ... Mediumwave radio transmissions (sometimes called Medium frequency or MF) are those between the frequencies of 300 kHz and 3000 kHz. ... High frequency (HF) radio frequencies are between 3 and 30 MHz. ... A Grundig Shortwave receiver Shortwave radio operates between the frequencies of 3,000 kHz and 30 MHz (30,000 kHz) and came to be referred to as such in the early days of radio because the wavelengths associated with this frequency range were shorter than those commonly in use at... Very high frequency (VHF) is the radio frequency range from 30 MHz (wavelength 10 m) to 300 MHz (wavelength 1 m). ... This article is about the radio frequency. ... This page is about the radiation; for the appliance, see microwave oven. ... Extremely high frequency is the highest radio frequency band. ...

See also

• Hertz

The hertz (symbol Hz) is the SI unit of frequency. ...

External link