পাতা:মোটর শিক্ষক - শৈলজাপ্রসাদ দত্ত.pdf/৩৫০

মোটর শিক্ষকৰ লক্ষ NeoNeScQ Large calories kilogram-calories Iooo small calories - one kilogram of water raised one degree Centigrade at the temperature of maximum density. CAN DE INTERNATIONAL. The ihternational unit of candlepower maintained jointly by national laboratories of England, France and United States of Algerica. 敬 CARAT. The diamond carat standard in U. S.-2OO milligrams. Old standard 205.3 milligrams is 3'168 grs. . 會 , The gold carat: pure gold is 24 carats; carat is 1/24 part, CIRCULAR AREA. The square of the diameter = 12734 Xtrue area. True area = 978532 'x circular area. COULOMB. Unit qf quantity. The international coulomb is the quantity of electricity transferred by a current of one international ampere in one seconds Io* E. M. U = 3 x Io? '. S. U. Coulombs =(volts-seconds )/omhs - ampers X seconds. CUPT's 8 inches. DAY. Mean solar day - 144o minutes =864Coseconds s loog7379 sidereal day, Sidereal day - 861642O mean solar seconds. DIGIT. 3/4 inch. ; lic the 'apparent diameter of the sun or moon. DiOPTER. Unit of "powe' of a lens. The number of diopters s the reciprocal of the focal length in meters. DYNE. C. G. S. unit of force - that foree which acting for one second on one gram produces a velocity ofon cm. per sec. Flg--gravity acceleration in cm|sec sec. Dynes as wt. in gram, x acceleration of gravity in cnsecssec. م م * *