hardness measuring instrument

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• Measuring instrument — Captain Nemo and Professor Aronnax contemplating measuring instruments in Twenty Thousand Leagues Under the Sea …   Wikipedia

• Knoop hardness — /nup ˈhadnəs/ (say noohp hahdnuhs) noun microhardness of metal measured by resistance to indentation by a pyramidal diamond indentor. {named after Frederick Knoop, 1878–1943, US instrument maker who devised this means of measuring metal hardness} …  

• Shore durometer — Two inline skates wheels with different durometer 85A and 83A. Durometer is one of several measures of the hardness of a material. Hardness may be defined as a material s resistance to permanent indentation. The durometer scale was defined by… …   Wikipedia

• Operational definition — The operational definition of a peanut butter sandwich might be simply the result of putting peanut butter on a slice of bread with a butter knife and laying a second equally sized slice of bread on top An operational definition defines something …   Wikipedia

• durometer — instrument for measuring hardness of substances Scientific Instruments …   Phrontistery dictionary

• hydrotimeter — instrument for measuring water hardness Scientific Instruments …   Phrontistery dictionary

• sclerometer — instrument measuring hardness Scientific Instruments …   Phrontistery dictionary

• Brinell machine — instrument used to determine the hardness of metals by pressing a 1cm steel ball into a metal using a force of 3000 kilograms and measuring the indentation created …   English contemporary dictionary

• Rockwell scale — The Rockwell scale is a hardness scale based on the indentation hardness of a material. The Rockwell test determines the hardness by measuring the depth of penetration of an indenter under a large load compared to the penetration made by a… …   Wikipedia

• steel — steellike, adj. /steel/, n. 1. any of various modified forms of iron, artificially produced, having a carbon content less than that of pig iron and more than that of wrought iron, and having qualities of hardness, elasticity, and strength varying …   Universalium

• geology — /jee ol euh jee/, n., pl. geologies. 1. the science that deals with the dynamics and physical history of the earth, the rocks of which it is composed, and the physical, chemical, and biological changes that the earth has undergone or is… …   Universalium