This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1880 edition. Excerpt: ...by the length of its axis. That of the earth is equal to 85,500,000,000,000,000,000,000,000 C.G.S. units. Index Notation. This is a good opportunity to give the notation now adopted to save writing a long list of noughts in large numbers. It consists in writing the first of the whole numbers followed ...
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This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1880 edition. Excerpt: ...by the length of its axis. That of the earth is equal to 85,500,000,000,000,000,000,000,000 C.G.S. units. Index Notation. This is a good opportunity to give the notation now adopted to save writing a long list of noughts in large numbers. It consists in writing the first of the whole numbers followed by a decimal point, and then indicating that the whole number and decimal are to be multiplied by 10 as many times as may be necessary. The number of times is indicated by a small figure called the "index" above and after a lO.f This index gives the number of noughts in the multiplier; and as only one figure is put to the left of the decimal point in the number, the index is also the total number of noughts and figures after the first number. Thus, 8.5 x 10" is known at once to be 8 followed by 6 figures, the first of which is a 5 and the rest noughts. Page 49. f Thus, 102 = 10 x 10 = 100, 103 = 10 x 10 x 10 = 1000, and so on. In this system of notation the earth's magnetic moment is written 8-65 x 1025 which is a much more convenient number both to write and read than the row of noughts above. It shows that the decimal point is to be moved 25 figures to the right. Long decimals are expressed in a similar way, only the index is written with a negative sign. A negative index means that the number is to be divided by 10 that number of times. Thus, 855 x 10-" means a decimal which, if written in full, is 0-00000855 It shows that the decimal point is to be moved 6 figures to the left. Units.--Intensity Of Magnetization. Let us imagine a quantity of a substance all uniformly magnetized, and let us cut any bar out of it and determine its magnetic moment. Let us now, leaving the seotion of the bar the same, double its length. We...
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Add this copy of A Physical Treatise on Electricity and Magnetism, to cart. $58.91, good condition, Sold by Bonita rated 4.0 out of 5 stars, ships from Hialeah, FL, UNITED STATES, published 2010 by Nabu Press.
