National Bureau of Standards Circular, Τεύχη 569-5751956 |
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Σελίδα 8
... that there are some precautions to be taken in quartz fusing op- erations . 4.1 Strength Strength is defined as the resistance of material 8 on the fibers including sputtering , evaporat- heat radiation , the fumes and disagreeable.
... that there are some precautions to be taken in quartz fusing op- erations . 4.1 Strength Strength is defined as the resistance of material 8 on the fibers including sputtering , evaporat- heat radiation , the fumes and disagreeable.
Σελίδα 9
4.1 Strength Strength is defined as the resistance of material to fracture or quantitatively as he critical value of stress at which frac- ure occurs [ 223 ] . The mechanical strength of used silica can be considered in three cate ...
4.1 Strength Strength is defined as the resistance of material to fracture or quantitatively as he critical value of stress at which frac- ure occurs [ 223 ] . The mechanical strength of used silica can be considered in three cate ...
Σελίδα 14
... define as is evidenced by the numerous papers on the subject some of which attempt to describe the condition of glass as distinct from or similar to the sol- id and liquid states [ 124 to 164 ] . 5.1 Structure The present picture of the ...
... define as is evidenced by the numerous papers on the subject some of which attempt to describe the condition of glass as distinct from or similar to the sol- id and liquid states [ 124 to 164 ] . 5.1 Structure The present picture of the ...
Σελίδα 17
... defined in terms of thermal his- tory and the temperature of measurement . small coefficient for fused silica as com ... definition as well as a lower limit , with a viscosity over 1014 approaching infi- nity as a quantitative measure ...
... defined in terms of thermal his- tory and the temperature of measurement . small coefficient for fused silica as com ... definition as well as a lower limit , with a viscosity over 1014 approaching infi- nity as a quantitative measure ...
Σελίδα 25
... definition of glass , Glass Ind . 26 , 417 ( 1945 ) . [ 302 ] V. E. Lysaght , The Knoop identer as applied to testing nonmetallic materials , ASTM Bull . No. 138 ( 1946 ) . [ 303 ] O. Ralston , Quartz and silica , Mining Met . 28 , c199 ...
... definition of glass , Glass Ind . 26 , 417 ( 1945 ) . [ 302 ] V. E. Lysaght , The Knoop identer as applied to testing nonmetallic materials , ASTM Bull . No. 138 ( 1946 ) . [ 303 ] O. Ralston , Quartz and silica , Mining Met . 28 , c199 ...
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.