When this ratio is 10, the difference in intensity of the sounds is said to be one bel, a unit named in honour of the United States inventor Alexander Graham Bell.
Usually frequency is expressed in the hertz unit, named in honour of the 19th-century German physicist Heinrich Rudolf Hertz, one hertz being equal to one cycle per second, abbreviated Hz; one kilohertz (kHz) is 1,000 Hz, and one megahertz (MHz) is 1,000,000 Hz.
Farad, unit of electrical capacitance (ability to hold an electric charge), in the metre kilogram second system of physical units, named in honour of the English scientist Michael Faraday.
The curie (symbol Ci), a unit of radioactivity, is named in honour of her and Pierre (although the commission which agreed on the name never clearly stated whether the standard was named after Pierre, Marie or both of them).
The ohm, the unit of resistance, was named in honour of Georg Ohm, and is symbolised by the Greek letter Ω. 1 Ω is the resistance that will produce a potential difference of one volt in response to a current of one amp.
The CGS unit of energy was the "erg", while the SI unit of energy was named the "joule" in honour of Joule.
The unit of magnetic inductance is the henry, named in honour of the 19th-century American physicist Joseph Henry, who first recognized the phenomenon of self-induction.
Curie, in physics, unit of activity of a quantity of a radioactive substance, named in honour of the French physicist Pierre Curie.
Ohm, abbreviation Ω, unit of electrical resistance in the metre-kilogram-second system, named in honour of the 19th-century German physicist Georg Simon Ohm.
It was named in honour of the 19th-century German physicist Wilhelm Eduard Weber and equals 108 maxwells, the unit used in the centimetre gram second system.
