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www.reference.com/article/metal-guitar-scales-6571bd0d78f6c885

Metal guitar scales are notes played in an order that best applies to metal type of music. A few popular metal guitar scales include Phrygian Dominant, Lydian and Hungarian Minor. The Lydian is a favorite of renowned metal guitarists such as Joe Satriani, Steve Vai and ...

www.reference.com/article/invented-hardness-scale-c9066e69afdad70

The hardness scale, or the Mohs Hardness Scale, was developed by Friedrich Mohs, a German geologist and mineralogist, in 1812. This qualitative test was the first widely used field test among geologists.

www.reference.com/article/can-chart-metals-rockwell-hardness-scale-60012ebecdddf43c

To see a chart of where various metals and materials fall on the Rockwell Hardness Scale, navigate to sizes.com/units/hardness_rockwell.htm. The website contains a brief description of the Rockwell Hardness Scale and is followed by a table containing 30 different hardne...

www.reference.com/article/compare-metal-hardness-57371a3558909dcb

Compare the hardness of certain metals using one of several tests, including the Mohs scale, the Brinell scale and the Vickers scale. The Vickers and Brinell methods test metals by seeing how well they resist buckling or deformation when a load is placed on them. The Mo...

www.reference.com/article/scale-used-indicate-hardness-minerals-727e0ac7f7811a15

The Mohs scale indicates the hardness of minerals by noting how scratch resistant they are. The test was developed in 1812 by the German mineralogist Friedrich Mohs. Diamond, the hardest known substance, is a 10 on the Mohs scale; talc, one of the softest known substanc...

www.reference.com/article/methods-testing-metal-hardness-7f201319634a9bcf

Scratch, rebound and indentation hardness testing methods are the three main ways to determine how resistant metals are to outside forces that may permanently alter their shapes. Testing processes such as the Knoop, Vickers or Rockwell Hardness test utilize the same bas...

www.reference.com/article/metal-hardness-comparison-7bb27a622152226b

A metal hardness comparison is a method by which the hardness or resistance to malformation of a metal is determined by comparing it to other materials. Since multiple scales are used to determine hardness, comparing metals on the same scale ensures consistency.