For example, the ED 50ĭose is the amount of the substance that benefits 50% of the test population. The measurement is usually given as a subscript. That receives the desired benefit from a dose of the substance being studied. effective dose (ED) a measure used in pharmacology to express the percentage of a population EF a symbol for energy factor (see below) or for the Enhanced Fujita The EER is equal to 0.293Ġ71 times the COP under the specified conditions.īelow). The EER is computed as the coolingĬapacity of the unit (in Btu per hour) dividedīy the electric power consumed (in watts)Īt a temperature of 95 ☏ (35 ☌) and under specified test conditions. EER an abbreviation for energy efficiency rating, a U.S. The measurement is traditionally stated in squareįeet, representing the area of the radiator surface, but it is actually interpretedĪs a unit of power,with 1 EDR ft 2 equal to 240 Btu per hour. EDR (sq ft) an abbreviation for Equivalent Direct Radiation, a unit used in the design The ecm is the product of theĬharge e on an electron and a distance ofġ centimeter (cm). The moment of an electricĭipole is the product of an electric charge and the distance by which theĬharge is displaced from the center of charge. ecm a unit of electric dipole moment used in physics. The actual intervalīetween these crossings, the eclipse year, has a length of 346.62 days. Of the sun on the line do not fall exactly a year apart. However, the line of nodes rotates slowly, so comparable appearances Or moon can only occur at times when the moon and sun both lie very close The sun intersect in a line called the line of nodes. Of the moon's orbit around the earth and the plane of the earth's orbit around EBHC stands for "equated busy-hour call." eclipse year a unit of time used in astronomy in the prediction of eclipses. EBHC a unit of telecommunications traffic density equal to 2 call minutes (120 EBC abbreviation for European Brewing Commission, frequently used forĪ unit of turbidity equal to 4.08 NTU or FNU. To measure the drift rates of gyroscopes and various pointing devices inĪerospace engineering. Per day), the rate at which the earth rotates on its axis. earth-rate unit (eru) a unit of angular velocity equal to 15° per hour (one revolution represents the minimum quantity in the package.) Manufacturers and suppliers using the Estimated Symbol are asserting that the product meets EU regulations limiting the amount that the package contents can vary from the stated average. is a "minimum fill" jurisdiction: the statement of quantity in the U.S. The EU is an "average fill" jurisdiction: this means that the statement of quantity represents the average quantity in the package. e the Estimated Symbol often seen following a measurement of quantity on packages of cosmetics and other products, primarily in the European Union (EU). It is the first letter of the word "exponential." Other mathematicians continued Leonhard Euler (1707-1783) introduced the symbol e, probably because Value of this function is, the faster the function grows. We call "exponential growth." As a result, the larger the Is equal to the value of the function itself: an example of the behavior
The most important is that the rate of change in the function e x The real number e is irrational, which means that its decimal expansion
e a mathematical unit used as the base of "natural" logarithms and exponentials. In November 2018 CGPM adopted a new definition of the ampere by specifying a fixed value of e is equal The symbol e is often used as a unit of measure. Other particles in atomic physics are whole-number multiples of this charge, Units: E E e a symbol for the electric charge on one electron.
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