SI Multiples of Volt (V)
Submultiples Submultiples Submultiples Multiples Multiples Multiples Value SI Symbol Name Value SI Symbol Name 10−1 V dV decivolt 101 V daV decavolt 10−2 V cV centivolt 102 V hV hectovolt 10−3 V mV millivolt 103 V kV kilovolt 10−6 V µV microvolt 106 V MV megavolt 10−9 V nV nanovolt 109 V GV gigavolt 10−12 V pV picovolt 1012 V TV teravolt 10−15 V fV femtovolt 1015 V PV… Read More
Continue ReadingElementary Charge
The elementary charge is the fundamental unit of electric charge. It is the smallest amount of electric charge that can exist independently and is equal to the charge on a proton or electron. The elementary charge was first proposed by Benjamin Franklin in 1750, and its value was first measured by Robert Millikan in 1909.… Read More
Continue ReadingInternational System of Units (SI)
The International System of Units, known by the international abbreviation SI, is the modern form of the metric system. It is the only system of units in which all seven base units are defined by international agreement. The SI was first published in 1960 and has been revised several times since then. The most recent… Read More
Continue ReadingTemperature
The SI Unit of temperature is Kelvin. The Kelvin scale is an absolute scale, meaning that it starts at absolute zero. Absolute zero is the point at which all thermal motion ceases. The Kelvin scale has no negative numbers, so temperatures can only be expressed as positive values. The Celsius and Fahrenheit scales are both… Read More
Continue ReadingCandela
Candela (cd) is an SI Unit for luminous intensity in the International System of Units (SI). It is equal to the luminous intensity in a given direction of a source that emits monochromatic radiation of frequency 540×1012 hertz and that has a radiant intensity in that direction of 1/683 watt per steradian. The name “candela”… Read More
Continue ReadingMol
A mole or (mol) is a SI Unit of measurement in the metric system. One mole of a substance has a mass equal to its atomic or molecular weight in grams. The number of particles in one mole of a substance is called Avogadro’s number, which is about 602 sextillion. Moles are used for measuring… Read More
Continue ReadingKelvin
Kelvin is an absolute scale of temperature named after the British physicist William Thomson Kelvin (1824-1907). Its SI Unit is the kelvin (K), which equals 1/273.16 of the thermodynamic temperature of the triple point of water. This value was chosen so that (zero 0) (K) represents “absolute zero”, a theoretical limit to coldness at which… Read More
Continue ReadingSecond Overview
Seconds are a unit of time, and they are the base unit of time in the International System of Units (SI Unit). Seconds can be divided into smaller units, such as milliseconds, and they can be measured using a stopwatch or clock. One second is equal to (1/60th of a minute i.e. 60 seconds in… Read More
Continue ReadingKilogram
A kilogram is a unit of measurement in the metric system. It is equal to 1000 grams, or about 2.2 pounds. The kilogram is the only SI unit with a prefix, and it is also the only SI unit that is not derived from another SI unit. The symbol for a kilogram is “kg”. The… Read More
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