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单词 common logarithm
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common logarithm
common logarithm n. a logarithm to the base 10.See note at logarithm n. Common logarithms are often regarded as easier to use in calculations than natural logarithms (see natural logarithm n.) and are used widely in engineering and science.
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a1683 J. Collins Doctr. Decimal Arithmetick (1685) 10 This raising of Powers is by some called Involution, and as for that of Months may be made by finding mean Proportionals, and those of days by help of the Common Logarythms.
1825 O. Gregory Math. Pract. Men 98 The common logarithm of any number is the index of that power of 10 which is equal to the said number.
1941 C. D. Hodgman Math. Tables from Handbk. Chem. & Physics (ed. 7) 1 A common logarithm, in general, consists of an integer which is called the characteristic and an endless decimal, the mantissa.
2010 Cellulose 17 497/2 The common logarithms of the viscosities were plotted against the reciprocal temperature.
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