National Bureau of Standards Circular, Τεύχη 569-5751956 |
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Σελίδα 2
... spherical - earth theories ) , the source current , i , must be specified closely if consistency is to be maintained at intermediate distances from the source . Hence , the source , i , was assumed ( a ) to have a uniform distribution ...
... spherical - earth theories ) , the source current , i , must be specified closely if consistency is to be maintained at intermediate distances from the source . Hence , the source , i , was assumed ( a ) to have a uniform distribution ...
Σελίδα 3
... Spherical - Earth Theory : 1 d - r sin o de [ sin 0 do ( volts ( volts per meter ) Er For the Plane - Earth Theory : - E , = k2II + d2II dz2 ( volts per meter ) ( 10 ) ( 11 ) One of the most important and difficult theoretical problems ...
... Spherical - Earth Theory : 1 d - r sin o de [ sin 0 do ( volts ( volts per meter ) Er For the Plane - Earth Theory : - E , = k2II + d2II dz2 ( volts per meter ) ( 10 ) ( 11 ) One of the most important and difficult theoretical problems ...
Σελίδα 4
... earth , σ , F = 1 . It is of interest to note , however , that a secondary factor other than unity defined by eq ... spherical - earth theory . Close to the source of the radiation , the com- putation by this method became unwieldy . The ...
... earth , σ , F = 1 . It is of interest to note , however , that a secondary factor other than unity defined by eq ... spherical - earth theory . Close to the source of the radiation , the com- putation by this method became unwieldy . The ...
Σελίδα 5
... spherical earth theory computations of the secondary factor , F. The details of the computation of the secondary factor , F , or the Hertz vector , II , near the earth have been elegantly worked out by the aforementioned authors . The ...
... spherical earth theory computations of the secondary factor , F. The details of the computation of the secondary factor , F , or the Hertz vector , II , near the earth have been elegantly worked out by the aforementioned authors . The ...
Σελίδα 6
... earth's atmosphere was reckoned from a mathematical model of the atmosphere which assumed a linear decrease with ... spherical - earth theory . 15 See figure 16 . 16 See figure 10 . surface of the earth from the source , conductivity of ...
... earth's atmosphere was reckoned from a mathematical model of the atmosphere which assumed a linear decrease with ... spherical - earth theory . 15 See figure 16 . 16 See figure 10 . surface of the earth from the source , conductivity of ...
Συχνά εμφανιζόμενοι όροι και φράσεις
accuracy amplitude apothecaries apparatus applied avoirdupois pound balance Biol Bremmer British Bureau of Standards calibration CALIFORNIA LIBRARY centimeter Ceram Chem coefficient computed constants cubic inches d(miles decibels density elastic electron feet field FIGURE fluid drams fluid ounces fluid scruple frequencies fused quartz fused silica gallon geodetic Glass Technol Government Printing Office graduated ground wave Inst intervals invar isotopes kc f kilogram laboratory line standards long ton mathematics methods metric system microbalance microseconds millimeters MISCELLANEOUS PUBLICATION mmmmm National Bureau nitrogen ooooo phase Phys physical Plane Earth Theory precision Proc Prototype Meter radians radio propagation Research secondary factor silica fibers Spherical Earth Theory square Standards Circular standards of length statute miles steel tapes surface tables temperature tion tonnage troy troy pound U. S. Government Printing units UNIVERSITY OF CALIFORNIA values velocity viscosity volts per meter Washington 25 weights and measures wwwww yard
Δημοφιλή αποσπάσματα
Σελίδα 18 - Square Measure 144 square inches (sq. in.) = 1 square foot (sq. ft.) 9 square feet = 1 square yard (sq.
Σελίδα 20 - Dry Measure. — 2 pints = 1 quart; 8 quarts = 1 peck; 4 pecks = 1 bushel.
Σελίδα 18 - CUBIC MEASURE 1728 cubic inches (cu. in.) = 1 cubic foot (cu. ft.) 27 cubic feet = 1 cubic yard (cu.
Σελίδα 21 - Measures of Weight 10 milligrams (mg) =1 centigram eg 10 centigrams =1 decigram dg 10 decigrams =1 gram g 10 grams =1 dekagram Dg 10 dekagrams =1 hektogram Hg 10 hektograms =1 kilogram Kg...
Σελίδα 29 - Used in assaying. The assay ton bears the same relation to the milligram that a ton of 2,000 pounds avoirdupois bears to the ounce troy; hence the weight in milligrams of precious metal obtained from one assay ton of ore gives directly the number of troy ounces to the net ton.
Σελίδα 12 - When an equal-arm balance is used to compare an object with standards of mass ("weights"), the effects of variations in the acceleration of gravity are self-eliminating and need not be taken into account, but the apparent mass of the object is slightly different from the true mass because of the buoyant effects of the surrounding air. Mass can then be computed from apparent mass by applying a correction for air buoyancy. When a spring balance is used, an additional correction accounting for the local...
Σελίδα 4 - The essential features of the system were embodied in a report made to the French National Assembly by the Academy of Sciences in 1791. A number of other nations were invited to cooperate with France in establishing the new system, and Holland, Denmark...
Σελίδα 18 - LIQUID MEASURE When necessary to distinguish the liquid pint or quart from the dry pint or quart, the word "liquid" or the abbreviation "liq" should be used in combination with the name or abbreviation of the liquid unit.