So it's time to buy some new wheels. What hardness should you get? What do the durometer numbers mean? What's a durometer anyway? Don't worry, we got you. All skateboard wheels are made from urethane, ...

"It's so hard that it doesn't wear down." Scientists make disturbing discovery about common winter vehicle accessory: '[It ...

This film discusses hardness testing methods in engineering, specifically focusing on the Brunell and Rockwell hardness tests. It explains how hardness is measured through indentation and penetration ...

IN NATURE of Jan. 23, 1926 (vol. 117, p. 117), I gave a description of a method of determining Hardness, in which a cone of the material to be tested was pressed against a hard surface (sapphire ...

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Hardness testing machines perform three common kinds of scientific hardness tests: the Brinell hardness test, the Rockwell hardness test, and the Vickers hardness test. The Rockwell hardness test is ...

Chinese scientists have come up with a way to create a high-quality “super diamond” in the laboratory with a hardness far exceeding natural diamonds. The researchers behind the development say ...

Researchers have discovered techniques to bestow superpowers upon sapphire, a material that most of us think of as just a pretty jewel.

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Put a known volume of water into a boiling tube. Add soap solution, one drop at a time, and shake the mixture for 10 seconds. Record the number of drops of soap needed to make a lather. The ...