National Bureau of Standards Circular, Τεύχη 569-5751956 |
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Σελίδα 2
... meters [ 75 ] , in ionization chambers [ 79 ] , and in magnetometers [ 73 ] . They may possibly be of some use as electrodes in electron tubes . One of the more extensive uses of silica fibers is in the microbalance field . The entire ...
... meters [ 75 ] , in ionization chambers [ 79 ] , and in magnetometers [ 73 ] . They may possibly be of some use as electrodes in electron tubes . One of the more extensive uses of silica fibers is in the microbalance field . The entire ...
Σελίδα
The National Standards of Length and Mass , U.S. Prototype Meter 27 and U. S. Prototype Kilogram 20 , are kept in this Standards Vault . Made of a stable alloy containing 90 percent of platinum and 10 percent of ir- idium , these ...
The National Standards of Length and Mass , U.S. Prototype Meter 27 and U. S. Prototype Kilogram 20 , are kept in this Standards Vault . Made of a stable alloy containing 90 percent of platinum and 10 percent of ir- idium , these ...
Σελίδα 1
... meter 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 ...
... meter 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 ...
Σελίδα 2
... meter , the liter , the gram . A standard is a physical embodiment of a unit . In general it is not independent of physical conditions , and it is a true embodiment of the unit only under specified conditions . For example , a yard ...
... meter , the liter , the gram . A standard is a physical embodiment of a unit . In general it is not independent of physical conditions , and it is a true embodiment of the unit only under specified conditions . For example , a yard ...
Σελίδα 4
... meter and the kilogram . The other units of length and mass , as well as all units of area , volume , and capacity , also compound units , such as pressure , are derived from these two fundamental units . The meter was originally ...
... meter and the kilogram . The other units of length and mass , as well as all units of area , volume , and capacity , also compound units , such as pressure , are derived from these two fundamental units . The meter was originally ...
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.