National Bureau of Standards Circular, Τεύχη 569-5751956 |
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Σελίδα 1
... bar for length and the kilogram cylinder for mass ( or weight ) . With the phenomenal growth of science and technology over the past half century , the Bureau has become a major research institution concerned not only with everyday ...
... bar for length and the kilogram cylinder for mass ( or weight ) . With the phenomenal growth of science and technology over the past half century , the Bureau has become a major research institution concerned not only with everyday ...
Σελίδα 4
... bars because it was found by precise measurements to have the same length as the Meter of the Archives . The meter is now defined as the distance under specified conditions between the lines on the International Prototype Meter without ...
... bars because it was found by precise measurements to have the same length as the Meter of the Archives . The meter is now defined as the distance under specified conditions between the lines on the International Prototype Meter without ...
Σελίδα 8
... bar , which is deposited at the National Bureau of Standards in Washington , is known in terms of the International Prototype Meter at the International Bureau of Weights and Measures at Sèvres , near Paris , France . 1 The U. S. yard ...
... bar , which is deposited at the National Bureau of Standards in Washington , is known in terms of the International Prototype Meter at the International Bureau of Weights and Measures at Sèvres , near Paris , France . 1 The U. S. yard ...
Σελίδα 9
... bar made of bronze in 1844 . The relation between that yard and the meter according to the most recent published determi- nations is 1 British Imperial Yard = 3 600 000 3 937 014 meter . Although opinions about the British yard standard ...
... bar made of bronze in 1844 . The relation between that yard and the meter according to the most recent published determi- nations is 1 British Imperial Yard = 3 600 000 3 937 014 meter . Although opinions about the British yard standard ...
Σελίδα 10
... bar seems to be detectable . a . Tests and Calibrations of Length Standards The National Bureau of Standards tests standards of length including meter bars , yard bars , miscellaneous precision line standards , steel tapes , invar ...
... bar seems to be detectable . a . Tests and Calibrations of Length Standards The National Bureau of Standards tests standards of length including meter bars , yard bars , miscellaneous precision line standards , steel tapes , invar ...
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.